revision and bio geography of centrolobium (

BioOne sees sustainable scholarly publishing as an inherently collaborative enterprise connecting authors, nonprofit publishers, academic institutions, researchlibraries, and research funders in the common goal of maximizing access to critical research.

Revision and Biogeography of Centrolobium (Leguminosae - Papilionoideae)Author(s): Michael D. Pirie, Bente B. Klitgaard, and R. Toby PenningtonSource: Systematic Botany, 34(2):345-359. 2009.Published By: The American Society of Plant TaxonomistsURL: http://www.bioone.org/doi/full/10.1600/036364409788606262

BioOne (www.bioone.org) is an electronic aggregator of bioscience research content, and the online home to over160 journals and books published by not-for-profit societies, associations, museums, institutions, and presses.

Your use of this PDF, the BioOne Web site, and all posted and associated content indicates your acceptance ofBioOne’s Terms of Use, available at www.bioone.org/page/terms_of_use.

Usage of BioOne content is strictly limited to personal, educational, and non-commercial use. Commercial inquiriesor rights and permissions requests should be directed to the individual publisher as copyright holder.

http://www.bioone.org/doi/full/10.1600/036364409788606262

http://www.bioone.org

http://www.bioone.org/page/terms_of_use

Systematic Botany (2009), 34(2): pp. 345–359© Copyright 2009 by the American Society of Plant Taxonomists

345

The Genus C entrolobium Mart. ex Benth—Centrolobium(Leguminosae, Papilionoideae) is a neotropical genus of seven species. It can be easily recognized, even when ster-ile, by an abundance of orange peltate glands covering most parts. The genus comprises mostly large trees to 30 m tall, with a straight bole and broad, rounded crown of terminal branches. The fruits are large winged samaras to 30 cm long, with a conspicuous spiny basal seed chamber. A number of species of Centrolobium are valued in the Neotropics for their timber, which is durable and richly colored yellowish-orange with patches of dark red, purple, or black.

Systematic Position— In his tribal classification of subfam-ily Papilionoideae, Polhill (1981 ; 1994 ) placed Centrolobium in tribe Dalbergieae, which was diagnosed by free keel petals, staminal filaments partly fused and without basal fenestrae, pods with specialized seed chambers, and seeds that accumu-late alkaloids or other nonprotein amino acids. Recent mor-phological and molecular phylogenetic studies suggest that tribe Dalbergieae sensu Polhill is not monophyletic ( Lavin et al. 2001 , 2005 ). In a phylogenetic analysis of plastid ( trnK - matKand trnL introns) and nuclear ribosomal (5.8S and ITS-1 and 2) DNA sequences, Lavin et al. (2001) recovered a “dalbergioid” clade comprising most of tribe Dalbergieae, but with mem-bers of tribes Aeschynomeneae and Adesmieae and subtribe Bryinae of tribe Desmodieae nested within it. This redefined “dalbergioid” clade is characterized by short shoots, glan-dular based trichomes, and aeschynomenoid root nodules. Within the dalbergioid clade, Lavin et al. (2001) recovered three distinct subclades: the Adesmia clade, the Dalbergia clade, and the Pterocarpus clade. Centrolobium was placed in the Pterocarpus clade, together with Pterocarpus Jacq., TipuanaBenth., Platypodium Vog., Platymiscium Vog., Ramorinoa Speg., Inocarpus Forst, Paramachaerium Ducke, and Etaballia Benth.

Taxonomic History— The generic name Centrolobium was proposed by Martius and published by Bentham (1839) based on Nissolia robusta Vell. The taxonomy of Centrolobiumwas reviewed by Rudd (1954) who recognized six species:

C. minus C.Presl, C. ochroxylum Rose ex Rudd, C. paraense Tul., C. robustum Mart. ex Benth., C. tomentosum Guill. ex Benth, and C. yavizanum Pittier. Two varieties were recognized within C. paraense Tul: var. orinocense Benth. and var. paraense . Although Rudd’s species delimitations were largely sound, new collections demonstrate that the characters that Rudd used to diagnose some taxa vary continuously, such as leaf base shape in the varieties of C. paraense , and as a result, Rudd’s species concepts should be re-evaluated. The extra-Amazonian Brazilian range of the genus was revised by Lima (1985) , who described one new species, C. sclerophyllum Lima, and redefined C. microchaete (Mart. ex Benth.) Lima, C. robus-tum , and C. tomentosum . Here, we present a taxonomic revi-sion of the whole genus over its entire geographical range.

Distribution of Centrolobium: Relevance to Neotropical Biogeographic History—Centrolobium species grow prin-cipally in areas of seasonally dry tropical forest (SDTF; as described in Prado and Gibbs 1993 ; Pennington et al. 2000 , 2006 ), but also in more humid forests. The genus is found in parts of Brazil, Bolivia, Ecuador, Peru, Colombia, Venezuela, Panama, and the Guianas ( Fig. 1 ). Centrolobium shows a mix-ture of species distribution patterns, with both widespread species and more geographically restricted endemics.

The present day distribution of SDTF is highly discontin-uous in the Neotropics. It roughly corresponds to the New World distribution of the “succulent biome” sensu Schrire et al. (2005) . Prado and Gibbs (1993) and Pennington et al. (2000) highlighted a series of unrelated species with widely discontinuous distributions in the separated nuclei of SDTF and suggested that during the Pleistocene, when climates were drier and cooler; there was a widespread expanse of seasonally dry vegetation in tropical South America. These authors favored vicariance over dispersal as a more parsimo-nious explanation for repeated patterns of disjunction within the SDTF. They also suggested that climatic fluctuations in the Pleistocene might have driven speciation in genera with high endemism in the SDTF.

Revision and Biogeography of Centrolobium (Leguminosae - Papilionoideae)

Michael D. Pirie, 1,5,6 Bente B. Klitgaard, 2,4 and R. Toby Pennington 3

1 Institute of Systematic Botany, University of Zurich, Zollikerstrasse 107, Zurich 8008 Switzerland 2 Department of Botany, Natural History Museum, Cromwell Road, London SW7 5BD U.K.

3 Royal Botanic Garden Edinburgh, 20a Inverleith Row, Edinburgh EH3 5LR U.K. 4 Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AE U.K.

5 Department of Biochemistry, University of Stellenbosch, Stellenbosch, Private Bag X1, Matieland 7602 South Africa

6 Author for correspondence ([email protected])

Communicating Editor: Matt Lavin

Abstract— A taxonomic revision and biogeographic study of the genus Centrolobium (Leguminosae - Papilionoideae) is presented. Centrolobium includes important timber trees distributed disjunctly in seasonally dry tropical forests and rain forests in Central and SouthAmerica, from Panama to south-eastern Brazil. It is characterized by large samaroid pods with a spiny seed case and an abundance of orange peltate glands covering the leaves and inflorescences. Taxonomic distinctions between some species of Centrolobium have been a source of con-fusion. Here, seven species are recognized: C. robustum , C. microchaete , C. tomentosum , C. ochroxylum , C. sclerophyllum , C. paraense, and C. yavi-zanum . Previously recognized varieties of C. paraense , C. paraense var. paraense and C. paraense var. orinocense, are not maintained. Phylogenetic analysis of DNA sequence data from the internal transcribed spacer region of nuclear ribosomal DNA and the plastid matK gene and trnL-trnFintron and spacer support the monophyly of the genus. Different molecular dating methods indicate that the Centrolobium crown group and lineages found to the west and east of the Andes diverged before the Pleistocene. Divergences between species occurring east of the Andes, particularly in Bolivia and south-eastern Brazil are more recent, but nevertheless unlikely to be explained by Pleistocene climatic changes.

Keywords— Conservation assessments , Dalbergieae , molecular dating , Neotropics , phylogeny reconstruction , seasonally dry tropical forest

346 SYSTEMATIC BOTANY [Volume 34

Pennington et al. (2004) went on to test the second hypoth-esis in four different clades with species confined to SDTF using molecular dating approaches. They concluded that in South America, species and clade ages largely predate the Pleistocene and are therefore inconsistent with a Pleistocene diversification scenario. More recent work has called into question the existence of widespread seasonally dry for-est in South America during the Pleistocene ( Lavin 2006 ; Pennington et al. 2006 ). High levels of geographic structure in phylogenies of SDTF clades indicate limited historical dis-persal between discontinuous areas of dry forest, suggesting that these areas have not been linked in the recent past ( Lavin 2006 ; Pennington et al. 2006 ). High geographic structure in phylogenies of STDF taxa such as robinioid legumes contrast with low geographic structure in phylogenies of some rain for-est taxa such as Inga reflecting the greater current geographic continuity of neotropical rain forest ( Lavin 2006 ; Pennington et al. 2006 ). More dated phylogenies are needed to test poten-tial generalities regarding the timing and geographical pat-terns of diversification in neotropical rain forests and SDTF ( Pennington et al. 2006 ).

The aims of this paper are a) to produce a dated phylogeny for Centrolobium to determine the timing of diversification of the genus and to assess the extent of geographic structure in its phylogeny; b) to test species delimitations in Centrolobium , with particular focus on species with disjunct distributions across discontinuous areas of SDTF; and c) to present a tax-onomic revision of Centrolobium , including an identification key to the species of the genus.

Materials and Methods

Molecular Phylogenetic Reconstruction: Taxon and Molecular Marker Sampling— This study utilized previously unpublished sequence data from 14 accessions, representing all seven species of Centrolobium . Sequences from 16 individuals representing 10 (outgroup) taxa of the Pterocarpus clade and Geoffroea decorticans (Gillies ex Hook. & Arn.) Burkart, the most distant outgroup, were obtained from published ( Lavin et al. 2001 ) and unpublished studies ( Platymiscium ITS sequences, Saslis-Lagoudakis et al. unpubl. results). Where not all markers were available for particu-lar outgroup accessions, those from different accessions representing the

same taxa were combined ( Appendix 1 ). Molecular markers were chosen based on outgroup sequence availability and levels of variation within Centrolobium and include the internal transcribed spacer regions of ribo-somal DNA (ITS), chloroplast encoded matK (including spacer regions on both sides of the matK exon), the trnL intron and the trnL-F spacer region.

DNA Extraction, PCR, and DNA Sequencing— Total genomic DNA was extracted using a CTAB method ( Doyle and Doyle 1987 ) without isopro-panol precipitation, thus avoiding coprecipitation of oxidized material ( Savolainen et al. 1995 ); silica dried or herbarium leaf material was homog-enized and incubated in CTAB for 20 minutes with 2-mercaptoethanol at 65°C, followed by 90 minutes ambient mixing with a mixture of chloroform and isoamyl alcohol. After centrifugation, the supernatant was purified using Wizard DNA purification system (Promega, Madison, Wisconsin).

The ITS region was amplified and sequenced using the primers of Beyra and Lavin (1999) . The matK and flanking trnK intron region was amplified in two pieces using the primers trnK1L and 4R; and 1F and trnK2R, and sequenced with the same primers plus 4R, 4F, 7L, and 32R following Lavin et al. (2000) . The universal primers of Taberlet et al. (1991) were used to amplify and sequence the trnL intron (primers C/D) and the trnL-trnF spacer (primers E/F). PCR amplifications were performed in 25 μl reactions containing 1 μl 0.4% BSA and 1 μl DMSO under the following cycling conditions: an initial 4 min. at 94°C; 35 cycles of 30 sec. at 94°C, 1 min. at 55°C, and 2 min. at 72°C; followed by 7 min. at 72°C. PCR products were purified using QIAquick PCR purification kits (Qiagen, Venlo, The Netherlands). Sequencing was performed on an ABI 3730XL sequencer (Applied Biosystems, Foster City, California).

Phylogenetic Analysis— DNA sequences were edited and aligned manually in SeqMan 4.0 (DNAStar Inc., Madison, Wisconsin), resulting in alignments of 706 positions (ITS), 2,631 positions ( matK ), and 1,089 posi-tions ( trnL-F ). Areas of the alignments where the assessment of homol-ogy was ambiguous were excluded from the analyses. Gaps that could be inferred unambiguously were scored as presence/absence characters, following the “simple gap coding” method of Simmons and Ochoterena (2000) .

Parsimony Analysis— Parsimony analyses were performed in the pro-gram PAUP* 4.0b10 ( Swofford 2002 ), assuming unordered character state transformation and equal character weights ( Fitch 1971 ). Shortest trees were obtained using the ‘branch and bound’ method. Bootstrap percent-ages were calculated as follows: 500 replicates of 100 random addition sequences (RAS), with TBR branch swapping, saving a maximum of 50 trees per replicate. To test for conflict among data partitions, topologies and bootstrap support were compared across data partitions. Congruence among data partitions was further assessed with partition homogeneity tests as implemented in PAUP* (with 100 replicates of 1,000 RAS, sav-ing a maximum of 10 trees). Based on the results of congruence testing, the data partitions were combined in further analyses. One accession (C. tomentosum [e33]) with conflicting placements in the individual anal-yses was excluded from the combined analyses. All other accessions, including those with missing data, were included in the combined analy-ses. Four of 26 Centrolobium accessions were lacking sequences for at least one of the three sequenced cpDNA regions (corresponding to 12.3% of aligned bases scored as missing data). Six Centrolobium accessions were missing ITS sequences (13.8% of aligned bases).

Bayesian Inference— The ITS and chloroplast datasets were com-bined in analyses using Bayesian inference, as implemented in MrBayes version 3.1.2 ( Huelsenbeck and Ronquist 2001 ). The dataset was divided into partitions corresponding to ITS, trnL-F and matK , and rates and sub-stitution models were allowed to vary across the partitions. Modeltest 3.06 ( Posada and Crandall 1998 ) was used to select the substitution model best fitting each sequence data partition. Geoffroea decorticans was designated as the single outgroup taxon. Two searches, each with four simultaneous MCMC chains, were run for 5,000,000 generations, saving one tree per 100 generations. Convergence was confirmed by analysis of the samples using TRACER (Rambaut and Drummond 2003). The burn-in values were determined empirically from the likelihood values of saved trees. The burn-in was discarded and 50% majority rule consensus trees calculated together with approximations of the PP for the observed bipartitions from the remaining trees. Trees have been posted to TreeBASE (study number S2301).

Molecular Dating— The combined chloroplast and ITS data were used in molecular dating analyses. To test whether the sequence data had evolved in a clocklike fashion, a likelihood ratio test was performed on the first of the most parsimonious tree topologies. Likelihoods of the data with and without a molecular clock constraint were calculated and the likelihood ratio statistic compared with χ2 critical value with 20 degrees of freedom ( Felsenstein 1981 ). The test rejected the molecular clock assump-tion ( p < 0.001).

F ig . 1. Distribution map for species of Centrolobium . C. yavizanum = filled circles; C. paraense = filled squares; C. ochroxylum = filled triangles (point up); C. microchaete = pentagons; C. tomentosum = open squares; C. sclerophyllum = filled triangles (point down); C. robustum = stars.

2009] PIRIE ET AL.: CENTROLOBIUM 347

We therefore applied two different molecular dating methods; penal-ized likelihood (PL; Sanderson 2002a ) and the Bayesian uncorrelated relaxed clock method ( Drummond et al. 2006 ) to correct for rate heteroge-neity. While the latter method directly incorporates uncertainty in topol-ogy and branch length estimation into the error margins, such uncertainty can also be approximated when applying PL by using a variable sample of trees as input (see below). Both methods can also estimate absolute ages by constraining the age(s) of one or more nodes (molecular clock calibration). In all analyses, Geoffroea decorticans and the accessions of Platymiscium , which form two branches of a basal trichotomy in the cpDNA and com-bined analyses, were ‘pruned’ from the trees, leaving a newly defined root node, corresponding to the most recent common ancestor (mrca) of Grazielodendron and Centrolobium and to node 51 in the analysis Lavin et al. (2005) . The age of this node was fixed at 41.9 mya following the results of Lavin et al. (2005 ; node 51, p.579, Fig. 2 ). The fossil Tipuana ecu-atoriana Burnham ( Burnham 1995 ) was used to impose a minimum age of 7.9 million years on the Tipuana stem node. Both calibrations are indicated in the chronogram .

Penalized likelihood (assuming rate autocorrelation) was implemented in the software package r8s ( Sanderson 2002b ). The optimum smooth-ing parameter value was determined using the cross validation proce-dure in r8s, based on the MrBayes tree with the highest likelihood score. This value was used to rate smooth the 1,000 last sampled trees from the MrBayes analysis (thus including variation in both topology and branch lengths). Mean node ages and standard deviations were summarized from the resulting ultrametric trees.

The Bayesian uncorrelated relaxed clock method was implemented in the software package BEAST ( Drummond and Rambaut 2007 ). We applied a lognormal distribution to the rates. The root node was effec-tively fixed at 41.9 (mya) by the designation of a uniform prior with mini-mal bounds. Preliminary analyses indicated that the posterior distribution of the age of the Tipuana stem node was greatly in excess of 7.9 mya, and this prior was therefore omitted from the final BEAST analyses. The mcmc was run for five million generations, with sampling every 1,000 genera-tions, after which convergence was confirmed by analysis of the samples using TRACER (Rambaut and Drummond 2003). Burn-in values were determined empirically from the likelihood values of sampled trees and the burn-in from each run was excluded. The remaining trees were used to calculate a 50% majority rule consensus tree and node ages (mean and 95% confidence limits).

Taxonomic Treatment— The taxonomic account that follows is based on examination of 280 collections made available by the following her-baria: A, AAU, BM, BR, E, F, GH, K, LPB, MO, NY, RB, U, US, and USZ. A list of exsiccatae is provided in Appendix 2. Conservation status is based on IUCN categories of threat criteria (IUCN 2001). Vegetation type is assigned according to the following four major biomes: seasonally dry tropical forest (SDTF), lowland rain forest, savanna, and restinga, with more specific vegetations described as appropriate. Definitions of SDTF and savanna follow Pennington et al. (2000) . Savanna and SDTF change to rain forest along transitions of rainfall; rain forest grows in areas of higher annual rainfall, but a key factor is that rainfall is less strongly sea-sonal (with fewer entirely dry months) than in areas that support SDTF or savanna ( Thomas and de Vansconcellos Barbosa 2008 ). Restinga is a scrub vegetation growing on well-drained, sandy soils between the beach and coastal rain forests of Eastern Brazil. It forms a narrow band of vegetation ranging from a few hundred meters to a few kilometers wide ( Thomas and de Vansconcellos Barbosa 2008 ).

Results

Phylogenetic Analysis— Parsimony analysis of matKand trnL-F resulted in relatively unresolved topologies (not shown), particularly in the case of trnL-F . The phylogenies were without conflicting nodes with ≥ 70% bootstrap sup-port (BS; data not shown). The partition homogeneity test for the chloroplast data did not indicate significant conflict (p = 0.37), and the data were combined in further analyses. The monophyly of Centrolobium received high support (98% BS), but the only internal nodes subject to ≥ 70% BS corre-sponded to multiple accessions of C. ochroxylum and of C. paraense , plus a strongly supported sister group relation-ship between one of the accessions of C. microchaete (e1) and one of C. tomentosum (e33) ( Fig. 2 ). Details of the parsimony

analyses, including numbers of variable and informative char-acters, are presented in Table 1 . Direct comparison of analyses of the different markers is complicated by the differing sam-ple sizes for each region (as indicated in Table 1 ). Inclusion of the single accession of Centrolobium yavizanum , which lacked a matK sequence, resulted in a much larger number of most parsimonious trees.

Analysis of ITS resulted in a consensus topology that also included groupings of the multiple accessions of C. ochrox-ylum and of C. paraense , but which differed in a number of places from the cpDNA consensus ( Fig. 2 ). Comparison of trnL-F and ITS data partitions using the partition homogene-ity test did not indicate significant conflict ( p = 0.07), but com-parison of matK and ITS, and of combined trnL-F and matKwith ITS, did indicate conflict (both p = 0.01). Only one topo-logical difference received ≥ 70% BS, a sister group relation-ship between the two accessions of C. microchaete (e1 and e6) in the ITS tree, which conflicted with C. microchaete accession e1 grouping with C. tomentosum accession e33 in the combined cpDNA analysis ( Fig. 2 ). To eliminate this source of conflict, C. tomentosum (e33) was removed from the combined analy-ses of all of the data partitions. The partition homogeneity test in the absence of this taxon did, however, still indicate conflict between trnL-F / matK and ITS ( p = 0.01).

Parsimony and Bayesian analyses of the combined cpDNA and ITS data produced consistent results. BS and posterior probability (PP) values are indicated on the Bayesian 50% majority rule consensus topology ( Fig. 3 ). Of the three mark-ers sequenced, ITS was the most variable. However, the rel-ative contribution of informative characters from nuclear (ribosomal) and chloroplast encoded markers was similar (see Table 1 ), and the combined analyses included roughly double the number of informative characters in compari-son to the individual analyses. Nevertheless, resolution and support values showed little improvement in the combined analyses (compare Figs. 2 and 3 ).

Molecular Dating—r8s Analyses — The cross validation test for PL selected an optimal smoothing parameter of 3.2, which was used in all further PL analyses. The mean age of the stem node of Tipuana was 28.1 mya, much older than the 7.9 mya Tipuana fossil. The mean age of the mrca of Centrolobiumsummarized across 1,000 MrBayes trees was 7.5 mya, with a standard deviation of 0.9, a minimum age of 5.1 mya and maximum of 11.0 mya.

BEAST Analyses — Age estimations were consistent with those derived using r8s, although the (95%) confidence inter-vals were wider ( Fig. 4 ), thus providing a more conservative test of biogeographic hypotheses. In the following discussion, we will therefore refer to the results obtained using BEAST. The Tipuana stem node was estimated at between 14.2 and 39.7 mya, also much older than the Tipuana fossil. The confi-dence interval for the mrca of Centrolobium was between 3.5–15.9 mya.

Discussion

Species Delimitation— We mainly agree with the species delimitations of Rudd. The species of Centrolobium display two broad patterns of distribution. The first, exhibited by C.microchaete and C. paraense , is of wider distribution, in the case of C. microchaete with populations found in different disjunct areas. The second, exhibited by C. robustum , C. tomentosum , C.sclerophyllum , C. ochroxylum, and C. yavizanum , is of restriction


F ig . 2. Shortest trees (arbitrarily selected) from parsimony analysis of (a) nuclear ribosomal ITS and (b) chloroplast encoded matK and trnL-F data. Bootstrap support (where > 50%) is indicated above the branches. Nodes that collapse in the strict consensus are indicated by arrows.


to a relatively narrow geographic range. Some species display relatively large amounts of morphological variation across their ranges, e.g. Brazilian versus Bolivian populations of C. microchaete ; and others relatively little, e.g. C. paraense .

Monophyly of Centrolobium and Species Relationships— Analysis of both chloroplast and nuclear sequence data yielded strong support for the monophyly of Centrolobium . Within Centrolobium , multiple accessions of the same spe-cies sometimes formed monophyletic groups. However, few other conclusions regarding phylogenetic relationships could be drawn, due to low variation in the sequence data and phy-

logenetic conflict among data partitions. With the exclusion of just one taxon from the analyses, we were able to eliminate conflict supported by > 70% BS. Levels of phylogenetic reso-lution were not substantially greater in the combined analyses relative to the individual analyses, perhaps due to persisting phylogenetic conflict caused by incomplete lineage sorting or hybridization.

Biogeographic History— Pennington et al. (2004 , 2006 ) noted a preponderance of pre-Pleistocene speciation and high phy-logenetic geographic structure in South American SDTF clades. In Centrolobium , phylogenetic geographic structure is limited, although the timing of lineage diversification also appears to be largely pre-Pleistocene. Centrolobium began diversifying a minimum of 3.5 mya. The most north-westerly distributed species, C. yavizanum and C. ochroxylum , diverged from a common ancestor at least two mya, before Pleistocene climatic changes. The estimated ages of divergences between species from Bolivia and Brazil (plus C. paraense from Brazil, Guyana, Venezuela, and Colombia) span the Late Miocene and Pliocene, with the margins of error for some nodes also entering the Pleistocene. The distributions of C. yavizanumand C. ochroxylum are separated from those of other species of Centrolobium by the Andes Mountains, which may explain the relatively deep phylogenetic divergence. There is little phylo-genetic geographic structure in the species found east of the Andes, as illustrated by the widespread, overlapping distri-butions of C. robustum and C. microchaete and the widely dis-junct distribution of C. microchaete .

The levels of phylogenetic geographic structure in Centrolo-bium are lower than those observed in other South American SDTF clades ( Pennington et al. 2004 ). This may be because some Centrolobium species are not SDTF specialists, as they also grow in more humid, less seasonal formations such as the Amazon rain forest (e.g. C. paraense ) and the Brazilian Atlantic Coastal rain forest (e.g. C. robustum, C. tomentosum ). Lavin (2006) and Pennington et al. (2006) argued that rain forest clades show less geographic structure than dry forest clades because of the greater continuity of rain forest com-pared to SDTF. The wide ecological tolerance of Centrolobiummay have allowed it greater opportunity for migration, lead-ing to the lack of geographic structure observed in the east of its range.

Taxonomic Treatment

Centrolobium Mart. ex Benth. , Ann. Mus. Vind. 2: 95. 1839. Benth., in Mart. Fl. Bras. 15.1: 263–266. 1862; Rudd, J. Wash. Acad. Sci. 44: 284–288. 1954; Lima, Arq. Jard. Bot. Rio de Janeiro 27: 177–191. 1985.—TYPE: Centrolobium robustum (Vell.) Mart. ex Benth.

F ig . 3. 50% majority rule consensus tree from Bayesian analysis of combined ITS and chloroplast data. Posterior probabilities of clades (where > 0.50) are indicated above the branches, bootstrap support from parsimony analyses (where > 50%), below.

Table 1. Details of maximum parsimony analyses (all employing ‘branch and bound’ method as implemented in PAUP* to find all shortest trees). Combined analyses in which taxa with missing data were excluded are indicated by “ 1 ”, otherwise all taxa with at least one marker sampled were included.

No. taxa Included chars Variable chars Pars.inf. chars Inf. indels No. trees Tree length CI RI

matK 22 2634 299 152 10 23 360 0.886 0.882trnLF 17 1119 89 31 9 84 98 0.908 0.859matK/trnLF 23 3753 388 183 19 3192 462 0.883 0.868matK/trnLF1 16 3753 349 99 17 16 409 0.890 0.815ITS 19 673 260 164 - 24 484 0.698 0.653Combined 23 4426 647 344 19 114 957 0.778 0.736Combined1 12 4426 503 160 15 4 663 0.848 0.649


F ig . 4. Chronogram from BEAST molecular dating analysis. The error margins for age estimations are indicated by bars at the nodes (thicker, lighter bars representing BEAST posterior distributions, thinner, darker bars representing the mean ± SD summarised from penalized likelihood rate smoothing of 1,000 MrBayes trees). Timescale and age calibration points A (secondary calibration from Lavin et al. [2005]) and B (fossil Tipuana [ Burnham, 1995 ]) are also indicated, as are the timeframes of speciation within Centrolobium (large filled rectangle), and Pleistocene climatic changes (rectangle above the time scale).


Trees, 4–35 m tall; trunk commonly buttressed at base, to 100 cm in diameter; bark grayish, vertically fissured, the sap red; wood yellowish or orange with streaks of red, purple, or black; twigs mostly densely pubescent, the twigs, leaves, inflorescences, and fruits dotted with reddish-orange peltate glands. Leaves imparipinnate, (5-)9–17(-23)-foliolate; stipules usually caducous, rarely persistent, deltoid to broadly orbic-ular, the apex acute; leaflets ovate, elliptic or oblong, sym-metrical or asymmetrical, the base cordate to rounded, the margins entire, the apex acute to shortly acuminate, the vena-tion brochidodromous. Inflorescences of terminal panicles; bracts narrowly to broadly ovate, rarely fan-shaped (only in C. ochroxylum , Fig. 5K ), usually persistent, rarely cadu-cous, reflexed or upright, the apex acute or obtuse; bracteoles narrowly or broadly ovate, persistent or caducous. Flowers 10–22(-25) mm long, sweetly scented; calyx tubular, cam-panulate or urceolate, sometimes adaxially gibbous, the base acute, obtuse or truncate, 5-lobed, the three abaxial lobes unequal, the apices acute or obtuse, the two adaxial lobes fused for almost their entire length, the apex emarginate; corolla yellow, sometimes suffused with red or violet, gla-

brous, the standard petal spatulate or obovate, with a short, thick claw with darker central marking, reflexed, the wing petals basally auriculate, with a long narrow claw, the keel petals fused for 1/3 of their lower margin, the upper mar-gin auriculate at the base; stamens 10, fused monadelphously into an open sheath, the anthers 1–1.5 mm long, dorsifixed, versatile. Fruits 1-few-seeded samaras, 6.8–22(-27) cm long; seed chamber basal, subcylindrical, externally echinate; wing distal, chartaceous or coriaceous, usually indumented and covered with long-stalked to subsessile peltate glands; stylar spine fused to the samara wing for a variable distance, the free apex at a ca. 45°, 90° or 120° angle with the wing mar-gin; spines of seed chambers sparsely to densely tomentose; seeds 2–3 × 1–1.5 cm, oblong, testa thin, green, albuminous. Figures 5A-V , 6A-U .

Distribution— From Panama, throughout northern South America to Bolivia and Santa Catarina state in southern Brazil, but largely avoiding the Amazon Basin, from sea level to 1,000 m elevation. Figure 1 .

Habitat— Seasonally dry tropical forests to lowland rain forests.

Key to CENTROLOBIUM Species

1. Stipules persistent, ca. 15 × 15 mm, leaf-like, broadly ovate ..................................................................................................................................... 3. C. paraense. 1. Stipules caducous, 2–15 × 2–4 mm, not leaf-like, narrowly ovate, deltate. .................................................................................................................................. 2

2. Calyx urceolate. Bracts deltoid ( Fig. 5P ). Leafl ets 5–11 × 2–5 cm, narrowly ovate or elliptic, coriaceous ........................................... 5. C. sclerophyllum. 2. Calyx campanulate or tubular. Bracts fan-shaped, narrowly or broadly ovate. Leafl ets (4-)6–20 × (2–)4–9(-14) cm, oblong, elliptic or ovate, charta-

ceous or/to membranaceous, rarely coriaceous. ................................................................................................................................................................... 3 3. Leafl ets membranaceous or coriaceous, the lower surface matted with twisting trichomes and dense glands. ...................................................... 4

4. Bract fan-shaped, 2–2.5 × 3–3.5 mm ( Fig. 5K ). Flower 15–18(-25) mm long. Samara covered by sparse trichomes. Western Ecuador and north western Peru ....................................................................................................................................................................................... 2. C. ochroxylum .

4. Bract narrowly ovate, 4–5 × 3–4 mm ( Fig. 5T ). Flower 18–22 mm long. Samara covered by dense trichomes. Central eastern Brazil ............................................................................................................................................................................................................... 6. C. tomentosum.

3. Leafl ets chartaceous or coriaceous, the lower surface glabrous or with sparse straight to curly trichomes and glands. ........................................ 5 5. Flowers 10–12 mm long. Calyx lobes 2–5 mm long, the apices acute. Leafl ets usually chartaceous, rarely membranaceous. ................ 6

6. Leaves 9–13(-19)-foliolate. Leafl ets elliptic or oblong, the base asymmetric ( Fig. 5H ). Bracts ovate, 1.5–4 × 1.5–3 mm. Fruiting stipe 1–10 mm long. Eastern Brazil and eastern Bolivia .......................................................................................................... 1. C. microchaete.

6. Leaves 13–17-foliolate. Leafl ets elliptic, the base symmetric ( Fig. 5U ). Bracts narrowly ovate, 3–5 × 1.5–3 mm. Fruiting stipe 20–30 mm long. Southern Panama and northern Colombia .............................................................................................................. 7. C. yavizanum.

5. Flowers 17–18 mm long. Calyx lobes 5–7 mm long, the apices obtuse. Leafl ets usually coriaceous, rarely membranaceous ............................................................................................................................................................................................................ 4. C. robustum.

1. C entrolobium microchaete (Mart. ex Benth.) Lima, Arq. Jard. Bot. Rio de Janeiro 27: 180. 1985. C. robustum (Vell.) Mart. ex Benth. var. microchaete Mart. ex Benth. in Mart. Fl. Bras. 15(1): 263. 1862.—TYPE: BRAZIL. Rio de Janeiro: “prope Canta Gallo”, 1859, Th. Peckolt s.n. [in BR the col-lection contains a label: Peckolt n. 260 ] (lectotype BR!).

Tree 7–26 m tall; trunk diameter 10–70 cm, the bark black-ish grey with light vertical and longitudinal fissures, inflo-rescences drying blackish brown. Leaves 9–13(-19)-foliolate; stipules caducous, not observed; leaflets 4–13.4 × 2–4 cm, usually elliptic or oblong, rarely ovate, the base asymmetric, rounded, the apex shortly acuminate or acute, chartaceous or coriaceous, both surfaces shiny green, covered with sparse pel-tate glands and sparse trichomes, or glabrous. Inflorescence axes, peduncles and calyces matted with dense dark brown trichomes and peltate glands; bracts 1.5–4 × 1.5–3 mm, ovate, persistent, reflexed, the apex acute; bracteoles 2–3 × 0.5–1.5 mm, elliptic, persistent, the apex obtuse or acute. Flowers 10–12 mm long; pedicel 2–3 mm long; calyx campanulate, the tube 5–7 mm, the base acute or obtuse, the three abaxial lobes 2–3 mm long, the apices acute, the two fused adaxial lobes

2–3 mm long, the apex emarginate, acute; corolla reddish-yel-low to dark tawny-brown, venation red; standard 10–11 × ca. 9 mm, suborbiculate, reflexed at anthesis, the wing petals ca. 10 × 4 mm, auriculate at the base of the blade, the keel petals ca.10 × 4 mm, auriculate at the base of the blade, fused for 1/3 of the lower margins; stamens 9–11 mm long, fused basally for 1/3 of their length. Samara 6.8–17.5 × 2.9–8 cm; seed chamber ca. 4 × 4 cm, the spines 6–17 × 0.5–1 mm, basal part sparsely indumented with curly trichomes, ca. 1 mm long, and short-stalked peltate glands, the apical part with similar trichomes, but lacking peltate glands; wing chartaceous with indumen-tum and glands similar to those on the seed chamber; stylar spine fused to samara wing for 8–20 mm, the free apex 5–15 mm long, oriented at a 45° angle from the wing margin; stipe 10–15 mm long; seeds ca. 1 × 0.5 cm, oblong to triangular, the testa glossy, light brown. Figures 5A , H-I; 6A-C.

Distribution— Eastern Brazil, from Santa Catarina to Ceará and Minas Gerais, and eastern Bolivia in the departments of La Paz and Santa Cruz, 30–680 m elevation. Figure 1 .

Habitat and Phenology— Rain forest and SDTF. In Brazil it prefers riverine habitats, while in Bolivia it grows in rain forest to SDTF. Prolific flowering from November to May in


F ig . 5. A–V. Part of an inflorescence, an open calyx with detail of indumentum, a bract, and a leaflet of all Centrolobium species. A, H, I. C. microchaete[from Mendonça et al. 136 , K]. B, J, K. C. ochroxylum [from Klitgaard et al. 421 , K]. C, L, M. C. paraense [from Jansen-Jacobs et al. 4192 , K]. D, Q, R. C. robustum [from Corcovado 15921 , K]. E, N, O, P. C. sclerophyllum [from Occhioni 16363 , K]. F, S, T. C. tomentosum [from Hage 1646 , K]. G, U, V. C. yavizanum [from Zarucchiet al. 4957 , K]. Scalebars: 1 mm in I, K, L, P, Q, T, V (shared: 3); 5 mm A, B, C, D, E, F, G (shared: 1); 10 mm in the leaflets of H, J, M, N, Q, S, U (shared: 2); and 5 mm in the inflorescences of H, J, M, O, Q, S, U. Drawn by Margaret Tebbs.


Fig. 6. A–U. The samara seed chamber and detail of the base of a seed chamber spine; and part of the samara wing and detail of the samara wing of all Centrolobium species. A, B, C. C. microchaete [from Saldías 377 , K]. D, E, F. C. ochroxylum [from Palacios et al. 818 , K]. G, H, I. C. robustum [from Martius160 , K]. J, K, L. C. sclerophyllum [from Santos 4 , K]. M, N, O. C. yavizanum [from Zarucchi et al. 4957 , K]. P, Q, R. C. paraense [from Davis 786 , K]. S, T, U. C.tomentosum [from Hatschbach & Zelma 49536 , K]. Scalebars: 1 mm in A, D, G, J, M, P, S (shared: 3); 20 mm B, E, H, K, N, Q, T (shared: 1); and 2 mm in C, F, I, L, O, R, U (shared: 2). Drawn by Margaret Tebbs.


Brazil and from March to April in Bolivia; fruit set from May to November in Brazil, and from May to October in Bolivia. Centrolobium microchaete is deciduous, and the leafless stage coincides with fruit set at the end of the dry season.

Uses and Vernacular Names— Used in the manufacture of fine furniture, laminate sheets for decorative panels, floor panels, handicrafts, and railway sleepers ( Lorenzi 2002 ). “Araribá” (Bahia, Santa Catarina, Parana, Rio de Janeiro and Minas Gerais), “gororoba” (Bahia), “lei nova” (Minas Gerais), “petimujú,” “putumujú,” “putumujú-mirim” (Bahia and Ceará), “tarara,” “tarara amarilla,” and “madera canaria” (Bolivia).

Conservation Status— VU A1cd ~ vulnerable because of a population size reduction of ≥ 50% over the last 10 yr due to a decline in area of occupancy, extent of occurrence and/or quality of habitat, and due to actual and potential levels of exploitation.

Representative Specimens Examined—BOLIVIA. Beni: Balliv ian, Feb 1990, Smith et al. 14429 (MO). La Paz: Nor Yungas, 1 km from Buena Vista, 5 May 1989, (fr.) Beck 17203 (K, MO, NY, LPB). Santa Cruz: Andres Ibañez, Santa Cruz, Velasco Ave, north of Irala Ave, 2001, (fr.) Pirie & Chatrou 1 (U).

BRAZIL. Bahia: ROAD Itacaré-Ubaitaba, 16 May 1966, Belém & Pinheiro 2219 (NY). Minas Gerais: Caratinga 10 Nov 1993, Klitgaard et al. 17 (AAU, K, RB). Paraná: Morretes 10 Mar 1983, Hatchbach 46250 (AAU, F, K). Santa Catarina: Morro de Fazenda, Itajai, 10 Jun 1954, Reitz & Klein 1877(K, NY).

Notes—Centrolobium microchaete is primarily distinguished by its small (10–12 mm) flowers vs. 12–22 mm in the other Brazilian species. From C. robustum in particular it is fur-ther distinguished by 9–13(-19)-foliolate leaves and 6.8–17.5 cm long samaras vs. (13-)15–19(-23)-foliolate leaves and (10-)18–26 cm long samaras. C. microchaete is the only species of Centrolobium found in Bolivia. Despite variation in the size of fruits and flowers (generally larger in Bolivian material) all Bolivian specimens share characteristics diagnostic of C. micro-chaete , notably the persistent recurved bracts, indument type and longer stipe found in neither C. ochroxylum nor C. tomen-tosum (with which they have sometimes been confused).

2. C entrolobium ochroxylum Rose ex Rudd, J. Wash. Acad. Sc. 44: 9. 1954.—TYPE: ECUADOR. El Oro: Portovelo (near Zaruma), 6 Oct. 1918, J.N. Rose & G. Rose 23370(holotype: US (no. 1022875)!; isotype: GH!, NY!).

Tree 6–30 m tall; trunk diameter 15–60 cm, sometimes but-tressed to ca. 1 m tall; bark pale brown with grey patches to whitish buff, smooth or lightly vertically and longitu-dinally fissured, the slash exuding a cream/pink sap, the twigs and the inflorescences drying blackish brown. Leaves (7-)9–13(-17)-foliolate; stipules ca. 2 × 2 mm long, deltoid, caducous; leaflets 6–20 × 5–14 cm, ovate or elliptic, the base symmetric, cordate or rounded, the apex shortly acuminate, membranaceous, both the surfaces covered with sparse to dense curly trichomes, the lower surface also with dense pel-tate glands. Inflorescence axes, peduncles and calyces with dense dark brown (nearly black) trichomes and dense pel-tate glands; bracts 2–2.5 × 3–3.5 mm, fan-shaped, caducous, reflexed, the apex rounded; bracteoles 1.5–2 mm × 0.8–1.25 mm, narrowly ovate, the apex acute, usually caducous. Flowers 15–18(-25) mm long; pedicel 4–6 mm long; calyx cam-panulate, 12–16 mm long, the tube ca. 8 mm long, the three abaxial lobes 5–8 mm long, the apices acute, the base obtuse or acute, the two fused adaxial lobes ca. 5 mm long, the apex emarginated, acute; corolla yellow, venation dark orange, the standard petal ca. 15 × 12 mm, suborbicular, reflexed by anthesis, with a central dark orange or pale yellow blotch,

the wing petals ca. 15–4 mm long, blade oblong, auriculate at the base of the blade, and with the basal ½ covered in sculp-turing, the keel petals ca. 15 × 5 mm, the blade triangular, auriculate at the base of the upper margin, fused for ¼ of the lower margins; stamens ca. 15 mm long, fused basally for ½ their length. Samara 10.5–27 × 4.1–10 cm; seed chamber 3–5 cm in diameter, the spines 15–40 × 0.5–1 mm, the basal parts sparsely indumented with straight trichomes ca. 0.1 mm long and subsessile peltate glands; wing chartaceous, glabrous but with glands as on the seed chamber; stylar spine fused to samara wing for 3–14 mm long, the free apex 4–16 mm long, at a 120° angle with the wing margin; stipe 6–10 mm long; seeds 2–3 × 1–1.5 cm, oblong, testa thin, green. Figures 5B , J-K; 6D-F.

Distribution— Ecuador, west of the Andes and the adjacent Tumbes area in Peru at 0–350 m. Figure 1 .

Habitat and Phenology— The species is found in SDTF on a mixture of soils. It is sometimes cultivated as a hedge-row tree. Flowering has been recorded in October and fruit set in September, February, May, and June. Centrolobium ochroxylum is a deciduous species in which the leafless stage coincides with fruit set, and trees develop new leaves while flowering.

Uses and Vernacular Names— It is cultivated as a hedge tree and as coffee shade, and for timber used in house, boat, and furniture construction ( Little and Dixon 1969 ). “Amarillo”, “amarillo de Guyaquil”, “amarillo lagarto”, “araribá” ( Rudd 1954 ; Acosta-Solis 1947 ).

Conservation Status—Centrolobium ochroxylum is in the Red List of endemic species of Ecuador 2000 ( Neill 2000 ), even though no threat category was attached to it in that pub-lication. In a study that identifies biodiversity conservation priorities for coastal northern South America, Peralvo et al. (2007) calculated the percentage decline in potential distribu-tion (km 2 ) to be 82.2% for C. ochroxylum , but still no category was attached. The conservation status of the species is, based to the available information, judged to be Near Threatened (NT).

Representative Specimens Examined— ECUADOR. Cañar: La Troncal, 2, Mar 1996, Neill et al. 10527 (MO). El Oro: Bosque Petrificado Puyango, el Mirador, Klitgaard et al. 421 (AAU, K, LOJA, NY). Esmeraldas: Anchayacu, 9 Nov 1994, Pennington et al. 15012 (K, NY). Guayas: Cerro Azul, 18 Mar 1980, (fl.) Dodson et al. 9651 (US, MO). Loja: Hacienda Banderones, 8 Jun 1997, Klitgaard et al. 551 (AAU, K, LOJA, NY). Los Ríos: Canton Vinces, Jauneche Forest, 1 Oct 1979, Dodsonet al. 8646 (MO). Manabi: Jama Canton, 18 Dec 1998, Neill et al. 11644(K, MO, NY). Napo: Estación Experimental INIAP-Payamino, 3 km north of Coca, 22 Sep 1985, (fr.) Palacios et al. 818 (K, MO, AAU, NY).

PERU. Cerro de Pasco, Central Selva, 17 May 1985, Hartshorn et al. 2763(MO). Tumbes: Matapalo, Zarumilla, 7 Feb 1993, Diaz et al. 6606 (MO).

Notes—Centrolobium ochroxylum , the only species occurring in Ecuador, and just ranging into adjacent northwestern Peru, is easily distinguished by its large (10–27 cm long) samaras in which the stylar spine is at a 90–120° angle with the wing margin (in the remaining species it is mostly at a 45° to 90° angle).

3. C entrolobium paraense Tul., Arch. Mus. Par. 4: 87. 1844.—TYPE: GUYANA. Pirara, 1841, Schomburgk 314 (holotype P!; isotypes: BM!, F!, G n.v., K!)

Centrolobium paraense var. orinocense Benth., in Mart. Fl. Bras. 15.1: 266. 1862. C. orinocense (Benth.) Pittier, Bol. Tecn. Minist. Agric. 5: 123 1944.—TYPE: VENEZUELA. Bolivar: “prope Angustura” (Ciudad Bolívar), May 1851, Purdies.n. (holotype: K!, NY photo of type no. 2678).


Centrolobium patinense Pittier, J. Wash. Acad. Sci. 5: 470. 1915.—TYPE: PANAMA: Darién, Punta Patiño, Pittier6611 (holotype: US!).

Trees 4–30 m tall; trunk diameter 15–100 cm; bark red-dish-brown with fine vertical fissures, the slash exuding reddish sap; young twigs and inflorescences drying a green-ish-cream color. Leaves (5-)9–11-foliolate; stipules ca. 15 × 15 mm, broadly ovate leaf-like, usually persistent, rarely cadu-cous; leaflets 7–17 × 4–8 cm, ovate to broadly ovate, the base usually symmetric, subcordate or rounded, the apex acumi-nate or obtuse, membranaceous, the upper surface glabrate or with dense curly trichomes, the lower surface venation covered with indumentum similar to that of the upper sur-face, the lower surface lamina with dense peltate glands. Inflorescence axes, peduncles and calyces with dense rusty brown, curly trichomes and dense peltate glands; bracts 5–10 × 5–10 mm, broadly ovate, persistent, the apex acum-i nate; bracteoles ca. 10 × 5 mm, broadly ovate, persistent. Flowers 12–19 mm long; pedicel 5–8 mm long; calyx cam-panulate, the tube ca. 9–10 mm long, the base acute, the three abaxial lobes 6–8 mm long, the two fused adaxial lobes ca. 6 mm long, the apex emarginated, obtuse; corolla dark yel-low to orange, the venation red, the standard petal 12–14 ×12–14 mm, orbicular, reflexed by anthesis, with central bright red to purple blotch, the wing petals 12–15 × 5–5 mm, blade ovate, auriculate at the base of the upper margins and with the outer surface covered in sculpturing, the keel pet-als 14–15 × 5 mm, the blade boomerang-shaped, auriculate at the base of the upper margins, fused for 1/3 of the lower margins; stamens 12.5–13 mm long, fused basally for ¼ to ½ of their length. Samara 12–22 × 4–8 cm; seed chamber 2–4.5 cm in diameter, the spines 10–30 × 1–1.5 mm, the basal part densely indumented with curly trichomes ca. 1 mm long and subsessile peltate glands, the apical part similar to basal part or glabrate; indumentum dense with ca. 0.5 mm long, curly trichomes and subsessile peltate glands; wing chartaceous, with indumentum and glands as of the seed chamber; stylar spine fused to samara wing for 15–25 mm long, the free apex 7–12 mm long, often at a 90° angle rarely at a 45° angle with the wing margin; stipe 10–20 mm long; seeds not observed. Figures 5F , S-T; 6P-R.

Distribution—Centrolobium paraense is distributed along the Caribbean coast of Guyana, Venezuela and adjacent Colombia and Panama, stretching into Amazonian Brazil reaching as far south as Rio Branco in Roraima, at altitudes between 50 and 350 m above sea level. It remains unclear if the species is native to or introduced into Trinidad. Figure 1 .

Habitat and Phenology—Centrolobium paraense is found in a wide range of habitats from being a dominant species in the SDTF of El Sombrero-Chaguramas-Tamanaco in Guarico, Venezuela to the savannas of Guyana and tropical rain for-est in Brazil. Flowering specimens were collected in March (Brazil), otherwise from May to September. Fruit sets from February to August The species is often described as drop-ping most or all of its leaves between February and April.

Uses and Vernacular Names— “Pau Raihna” (Brazil); “Kartang” (“Makusi”), “redwood” or “shipuradai” (“wapisi-ana”) (Guyana); “baluster”, “cartán” or “colorado” (Venezuela); “Colorado” (Colombia); “porcupine tree” (Trinidad).

Conservation Status— VU A3cd ~ vulnerable because of a population size reduction of ≥ 30% over the next 10 yr due to a decline in area of occupancy, extent of occurrence and/or

quality of habitat, and due to actual and potential levels of exploitation.

Representative Specimens Examined— BRAZIL. Roraima: Rio Branco, Boa Vista, Estação ecologica de Maracá, 8 Mar 1987, (fr.) Lewis 1420(K, NY).

COLOMBIA. Atlántico: Barranquilla, Jan 19, 38, Elias 1580F (A, NY, US).

GUYANA. Rupununi: Bushisland, Dadanawa, 9 Jun 1995, (fl.) Jansen-Jacobs et al. 4012 (K, NY, U, US).

PERU. Madre de Dios: Cocha Cashu, Manu National Park, 31 Aug 1989, Foster 9940 (F, MO).

PANAMA. Darien: Punta Patiño, Darien, Pittier 6611 (US). TRINIDAD. Port of Spain, Botanic Garden 10 Aug 1923, Fairchild 2844

(NY, US). VENEZUELA. Anzoategui: Bergantín, 14 Mar 1945, Steyermark 61487 (F,

MO). Aragua: Entre Villa de Cura y San Juan de los Morros, 26 Dec 1923, Pittier 11358 (NY, US). Bolivar: Monteco, 4 Aug 1978, Liesner & Gonzales 6000 (AAU, MO, NY). Guarico: Calabozo, Jun 1969, (fl.) Aristeguieta 7155(MO, NY, US). Portuguesa: Guanare, 13 Mar 1982, (fr.) Liesner et al. 12654(MO). Sucre: Fila de Guayuta, 18 Aug 1973, (fl.) Steyermark et al. 107725(F, MO, NY). Zulia: Santa Rosa, 21 Aug 1967, (fr.) Steyermark & Fernandez 99547 (F, NY, U, US).

Notes—Centrolobium paraense is easily distinguished from all other Centrolobium species by its large leafy stipules that leave a large scar when dropping off and by the large, broadly ovate bracts and bracteoles (5–10 × 5–10 mm).

Bentham (1862) described two varieties of C. paraense : var. paraense and var. orinocense . The latter was subsequently raised to the status of species by Pittier (1944) . Variety orinocense was distinguished from the typical variety by glabrescent leaf-lets with cordate bases vs. leaflets with dense indumentum and rounded bases. In our studies these differences are, how-ever, not upheld as leaves posses a combination of cordate and rounded leaflet bases, and as the amount of indumentum seems to be correlated with the age of the leaves.

4. C entrolobium robustum (Vell.) Mart. ex Benth., Ann. Wien Mus. 2: 95.1839. C. robustum var. macrochaete Mart. ex Benth. Mart. Fl. Bras. 15(1): 263. 1862. Nissolia robustaVell. Fl. Flum.: 298. 1825.—TYPE: BRAZIL. Rio de Janeiro: “habitat in silvis maritimis”, (lectotype: Fl. Flum. Icon. 7: tab 85. 1827[1831].

Centrolobium minus C. Presl., Bot. Bemerk.: 62. 1844.—TYPE: BRAZIL. Rio de Janeiro: “Habitat ad Rio de Janeiro Brasiliae”, “prope urbem in valle Larangeiras”, April 1834 [seen on BR specimen], Luschnath s.n. [labelled Martii Herb. Fl. Bras. n. 160 on specimen in K] (holotype: PR? n.v.; isotypes: BR!, K!, MO!).

Centrolobium minus C. Presl. var. longo-stipitata N. F. Mattos, Loefgrenia 78: 6. 1983.—TYPE: BRAZIL. Rio de Janeiro: “Habitat in Estado do Rio de Janeiro, Jardim Botânico”, Nov. 1969, Mattos 494 (holotype: RB n.v.).

Tree (7-)15–30 m tall; diameter unknown; bark lightly fis-sured; twigs and inflorescences drying blackish brown, glabrate. Leaves (13-)15–19(-23)-foliolate; stipules cadu-cous, not observed; leaflets 4–12(-18) × 1.5–6(-9) cm, elliptic or oblong, the base usually asymmetric, cordate, or rounded, the apex cuspidate, coriaceous, both the surfaces glabrous or with sparse curly trichomes, the lower surface with dense ses-sile peltate glands. Inflorescence axes, peduncles and calyces glabrate or with sparse rusty brown curly trichomes; bracts 3.5–6.5 × 2.5–4 mm, ovate, persistent, reflexed, the apex acuminate; bracteoles 2.8–3.1 × 0.6–0.9 mm, ovate, the apex acute, persistent. Flowers 17–18 mm long; pedicel 6–11 mm long; calyx tubular, the tube ca. 8 mm long, the base obtuse, the three abaxial lobes 5–7 mm long, the apices obtuse, the two fused adaxial lobes ca. 7 mm long, the apex emarginate,


obtuse; corolla dark yellow to orange suffused with dark red, the venation red, the standard petal 15–16 × 11–12 mm, orbic-ular, reflexed by anthesis, with central bright red to purple blotch, the wing petals 15–16 × 5–6 mm, blade ovate, auricu-late at the base of the upper margins and with the outer sur-face covered in sculpturing, the keel petals 15–16 × 5–6 mm, blade boomerang-shaped, auriculate at the base of the upper margins, fused for 1/3 of the lower margins; stamens 12.5–13 mm long, fused basally for ¼ to ½ of their length. Samara (10-)18–26 × 5–8 cm; seed chamber 3–3.5 cm in diameter, the spines 15–35 × 0.5–1 mm, the basal part densely indumented with curly trichomes ca. 1 mm long and short-stalked peltate glands, the apical part shiny rusty brown, glabrous; wing chartaceous with indumentum and glands as those of the seed chamber; stylar spine fused to the wing for 20–30 mm, free apex ca. 10 mm long, at a 45° angle with the wing margin; stipe 15–20 mm long; seeds not observed. Figures 5D , Q-R; 6G-I.

Distribution—Centrolobium robustum occurs in the states of Bahia, Rio de Janeiro and São Paulo in Brazil, from 0–750 m. Figure 1 .

Habitat and Phenology— The species occurs in coastal rain forest and in coastal scrub. Flowering specimens were col-lected in November, fruiting in November, March, July, and August.

Uses and Vernacular Names— “Araribá”, “araribá amarelo”, “iriribá” and “erarobá” (Rio de Janeiro and São Paulo; Lima 1985 ), “lei nova”, “putumuju” (Brazil in general; Rudd 1954 ).

Conservation Status— CR A2cd ~ critically endangered because of a population size reduction of ≥ 80% over the last 10 yr due to a decline in area of occupancy, extent of occur-rence and/or quality of habitat, and due to actual and poten-tial levels of exploitation.

Representative Specimens Examined— BRAZIL. Bahia: Itabuna, 10 Jul 1964, (fr.) Silva 58331 (NY, US). Rio de Janeiro: Estrada Dona Castorina, 18 Nov. 1985, Lima et al. 2622 (K). São Paulo: 4 Nov 1968, Koortfor s.n.(NY).

Notes— Presl (1844) distinguished Centrolobium robustumfrom C. minus by its larger samaras. Lima (1985) placed, how-ever, C. minus in synonymy under C. robustum , arguing that the type specimen of C. minus represents a specimen with immature fruits.

The differences between C. robustum and the most similar species C. microchaete are described in the notes of the latter species.

Centrolobium robustum is distinguished from C. tomentosumby its glabrous to glabrescent leaves and inflorescences (vs. densely indumented, also at maturity), the ovate, relatively small bracts and bracteoles (vs. narrowly ovate), and the samara with a stylar spine at a 45° angle with the wing margin (vs. at a 90° angle). The species differs from C. sclerophyllum by the relatively large membranaceous to coriaceous leaflets (vs. small rigid-coriaceous leaflets in C. sclerophyllum ), the ovate bracts and bracteoles (vs. deltate), and the (10-)18–26 cm long, indumented samara (vs. 10–12 cm long, glabrescent).

It has not been possible to locate the specimen cited as the type of C. minus var. longo-stipitata Mattos (= Mattos 494 ). The diagnosis of C. minus var. longo-stipitata specifies, how-ever, the fruiting stipe length to 1.8–2.5 cm which, along with the distribution, fits well with the range as below for C. robus-tum : 1.5–2.0 cm. The only other diagnostic feature of C. minusvar. longo-stipitata is a leaf character which is too variable to be reliable.

5. C entrolobium sclerophyllum Lima, Arq. Jard. Bot. Rio de Janeiro 27: 182. 1985.—TYPE: BRAZIL. Espírito Santo: Reserva Florestal da C.V.R.D., Linhares, próximo a estrada 161, talhão 604, 20/11/1973, J. Spada 205 (holo-type: RB !, isotypes: COL n.v., CVRD n.v., RBR n.v.).

Tree 6–30 m tall; trunk diameter 15–70 cm, the bark lightly fissured; twigs and inflorescences drying reddish brown. Leaves (11-)13–17(-19)-foliolate; stipules caducous, not observed; leaflets (3-)5–9(-12) × (1.5-)2–4(-5) cm, ovate, the base asymmetric or symmetric, cordate or rounded, the apex long-acuminate, coriaceous, the upper surface glabrous, dark green, the lower surface rusty brown, glabrous and with dense short-stalked peltate glands. Inflorescence axes, pedun-cles and calyces matted with rusty brown curly trichomes; bracts 3–5 × 1.5–3.5 mm, deltate, persistent, reflexed, the apex obtuse; bracteoles 1.5–3 × 0.6–1.2 mm, ovate, the apex obtuse, persistent. Flowers 16–17 mm long; pedicel 1–2 mm long; calyx urceolate, the tube 6–6.5 mm long, the base trun-cate, the three abaxial lobes 3–4 mm long, the apices acute, the two fused adaxial lobes 2–3 mm long, the apex emargin-ate, acute; corolla yellow, the venation deep red, the standard petal 15–16 × 11–12 mm, the wing petals 14–15 × 5–6 mm, the blade oblong, auriculate at the base of the upper margins and with the outer surface covered in sculpturing, the keel pet-als 14–15 × 5–6 mm, the blade half-moon-shaped, auriculate at the base of the upper margins, loosely adnate for 1/3 of the lower margins; stamens 15–16 mm long, fused basally for ½ of their length. Samara 10–12 × 3.5–4 cm; seed chamber 1.5–3 cm in diameter, the spines 7–16 × 0.5–1 mm, the basal with sparse indumentum of curly trichomes ca. 1 mm long and short-stalked peltate glands, the apical part shiny rusty brown, glabrate; wing chartaceous, glabrate or with sparse 0.2 mm long, straight trichomes; stylar spine fused to samara wing for 8–12 mm, the free apex 3–4 mm long, at a 45–90° angle with the wing margin; stipe 20–30 mm long; seeds not observed. Figures 5E , N-P; 6J-L.

Distribution— The species is found in the ‘Matas de tab-uleiro’ in southern Bahia and northern Espirito Santo. A dis-junct population occurs in the semiarid caatinga formations of western Bahia and northern Minas Gerais, at altitudes from 400–1,000 m. Figure 1 .

Habitat and Phenology— This little-known species occurs in SDTF. Flowering specimens were collected in February and April, fruiting in February and July.

Uses and Vernacular Names— “Banha-de-galinha”, “pau de sangue” and “putumujú pequeno” (Bahia) and “araribá”, “araribá rosa” and “lei rosa” or “lei nova” (Espirito Santo).

Conservation Status— CR A2cd ~ critically endangered because of a population size reduction of ≥ 80% over the last 10 yr due to a decline in area of occupancy, extent of occur-rence and/or quality of habitat, and due to actual and poten-tial levels of exploitation.

Representative Specimens Examined— BRAZIL. Bahia: Bom Jesus de Lapa, 2 Jul 1983, Coradin et al. 6358 (K, NY). Espirito Santo: 23 Aug 1981, (fr.) Lima 1635 (K). Minas Gerais: Itaobim, 3 Mar 1982 (fl.), Rizzini & Mattos Filho 1557 (RB). Rio de Janeiro: Quissamá, Faz. São Miquel, 14 Feb 2007 (fl.), Lima et al. 6510 (RB).

Notes—Centrolobium sclerophyllum is readily distinguished from the other species occurring in eastern Brazil by the urce-olate calyx and rigid coriaceous leaflets.

6. C entrolobium tomentosum Guillem ex Benth., Hook. Journ. Bot. 2: 66.1840.—TYPE: BRAZIL. Distrito Federal: “Brasilia, Cachoeira dos Campos”, P. Claussen & B.


Delessert 879 (lectotype: K!; isolectotypes: F!, GH!, K! (2 sheets), NY!).

Tree 10–35 m tall, trunk diameter 10–60 cm, the bark smooth; twigs and inflorescences light orange brown. Leaves (11-)13–17(-19)-foliolate; stipules ca. 15 × 4 mm, narrowly ovate, caducous; leaflets 7–16(-18) × 4–8(-10) cm, oblong or elliptic, the base asymmetric or symmetric, cordate or rounded, the apex obtuse, coriaceous or membranaceous, the upper surface with sparse, curly trichomes, the lower mat-ted with golden curly trichomes and dense peltate glands. Inflorescence axes, peduncles and calyces matted with dark brown curly trichomes; bracts 4–5 × 3–4 mm, narrowly ovate, caducous, upright, the apex acute; bracteoles 5–7 × 2–3 mm, oblong, the apex acute, persistent. Flowers 18–22 mm long; pedicel 3–5 mm long; calyx campanulate, the tube ca. 8–9 mm long, the base obtuse, the three abaxial lobes 5–8 mm long, the apices obtuse, the two fused adaxial lobes 5–7 mm long, the apex emarginated, obtuse; corolla yellow suffused by red, the venation dark red, the standard petal 15–16 × ca. 14 mm, reflexed by anthesis, the wing petals 14–15 × 5–6 mm, blade oblong, auriculate at the base of the upper margins and with the outer surface covered in sculpturing, the keel petals 14–15 × 5–6 mm, blade half-moon-shaped, auriculate at the base of the upper margins, loosely adnate for 1/3 of the lower margins; stamens 15–16 mm long, fused basally for ½ of their length. Samara 13–18(-23) × 6–8(-9) cm; seed chamber 3–5 cm in diameter, the spines 9–30 × 1–1.5 mm, the basal and apical parts moderately indumented with curly trichomes ca. 1 mm long and long-stalked peltate glands; wing charta-ceous or coriaceous, with indumentum and glands as those of the seed chamber; stylar spine fused to samara wing for 40–50 mm, the free apex ca. 20 mm long, at a 90° angle with the wing margin; stipe 10–15 mm long; seeds ca. 20 × 10 mm, oblong, smooth, the testa glossy rusty brown. Figures 5F , S-T; 6S-U.

Distribution—Centrolobium tomentosum has a wide geo-graphic range in central and eastern Brazil from São Paulo to Bahia and extending into the interior of Goiás, from 0–750 m. Figure 1 .

Habitat and Phenology— It occurs naturally in savanna and associated gallery forest, in varzea (floodplain) forest, and in coastal rain forest mixed with restinga; and is cultivated and invasive in secondary forests. The species is deciduous, and flowering was recorded in January to March, while fruit set takes place from August to November.

Uses and Vernacular Names— The species has beautiful wood that is used in boat and canoe construction, and for furniture and carriages ( Lorenzi 1992 ). “Araribá”, “araribá-rosa”, “aribá”, “araruva”, “ararauba”, “carijó”, “iriribá-rosa”, “putumuju” (Bahia), “tipiri” (Minas Gerais).

Conservation Status— VU A3cd ~ vulnerable because of a population size reduction of ≥ 30% over the next 10 yr due to a decline in area of occupancy, extent of occurrence and/or quality of habitat, and due to actual and potential levels of exploitation.

Representative Specimens Examined— BRAZIL. Bahia: Ilheus, Centro de Pesquisas do Cacau (CEPLAC), Pennington & Carvalho 293(E, K). Distrito Federal: Campus de IBDF, 28 Jul 1989, França & Melo 20331(NY). Espirito Santo: Linhares, 13 Nov 1993, Klitgaard et al. 27 (AAU, K, RB). Gioás: Corrumba de Goiás, 25 Jan 1968, Irwin et al. 19160 (K, NY). Minas Gerais: 1840, Claussen 879 (BM, F, GH, K, NY). Paraná: Arapoti, 28 Jan 1989, Hatchbach 52799 (NY). Rio de Janeiro: Rio de Janeiro, 13 Aug 1984, Oliviera 43 (NY). São Paulo: Bofetem, 9 Apr 1971, Gottsberger & Gottsberger 9471 (NY).

Notes— For differences between C. tomentosum and C. micro -chaete and C. robustum , see the notes under the latter two spe-cies. Centrolobium tomentosum does, however, bear closest resemblance to C. paraense . It is best distinguished by the narrowly ovate, caducous stipules, bracts and bracteoles vs. the longer persisting leafy stipules and the broadly ovate bracts and bracteoles of C. paraense and the large flower size (18–22 mm vs. 12–19 in C. paraense ).

7. C entrolobium yavizanum Pittier, J. Wash. Acad. Sci. 5: 439. 1915.—TYPE: PANAMA. Darién: Yaviza, 22 Apr 1914, H. Pittier 6572 (holotype: US!; isotypes: BM!, GH n.v., NY!).

Tree 8–25 m tall, with buttresses up to 1.8 m; trunk dia-meter 30–40 cm; twigs and inflorescences drying black-ish brown. Leaves 13–17-foliolate; stipules caducous, not observed; leaflets 6.5–12 × 4–5.5 cm, elliptic, chartaceous or membranaceous, the base asymmetric or symmetric, cor-date or rounded, the apex acuminate, both the surfaces with sparse straight trichomes and lower surface rusty brown, covered in short-stalked glands. Inflorescence axes, pedun-cles and calyces matted with dark brown curly trichomes; bracts 3–5 × 1.5–3 mm, narrowly ovate, persistent, reflexed, the apex acute; bracteoles 1.5–2.5 × 1–1.5 mm, narrowly ovate, the apex acute, persistent. Flowers 10–12 mm long; pedicel 3–7 mm long; calyx tubular, the tube 5–6 mm long, the base obtuse, the three abaxial lobes 2–5 mm long, the apices acute, the two fused adaxial lobes ca. 5 mm long, the apex emar-ginated, acute; corolla yellow/orange with central portion of standard red, the standard petal 11–12 × 9–10 mm, the wing petals ca. 10 × 3.5 mm, the keel petals ca. 12 × 4 mm; stamens 10–11 mm long. Samara 7.2–16 × 3.4–5.8 cm; seed chamber ca. 3 cm in dia meter, the spines 10–20 × 0.5–1 mm, the basal part sparsely indumented with curly trichomes ca. 1 mm long and long-stalked peltate glands, the apical part rusty brown, shiny, glabrate; wing chartaceous, glabrate, with sparse long-stalked peltate glands; stylar spine fused to samara wing for 3–5 mm long, the free apex 6–14 mm long, at a 45–90° angle with the wing margin; stipe 20–30 mm long; seeds not observed. Figures 5G , U-V; 6M-O.

Distribution— The species occurs in Darién province of Panama, and Bolivar, Santander, Antioquia and Boyacá departments in Colombia, at sea level. Figure 1 .

Habitat and Phenology—Centrolobium yavizanum has been collected in remnant primary SDTF and in disturbed areas such as roadside vegetation and as trees remaining in pas-tures. Flowering usually occurs from March to June, and fruit-ing from March to July.

Uses and Venacular Names— “Guayacán jobo” (Colombia). Conservation Status— The species has been designated

‘vulnerable’ on the IUCN red list of threatened species (Mitré 1997), due to threats of habitat loss through logging, clear cut-ting and human settlement.

Representative Specimens Examined— COLOMBIA. Antioquia: 23 Mar 1987, Zarucchi et al. 4957 (K, MO, NY, US). Bolivar: Loba, Amargamiento Rico, Apr 1916, Curran 483 (GH). Boyacá: Guaguaqui, 14 Jul 1917, Whitford& Pinzon 16A (A). Choco: Léon 550 (MO). Santander: Puerto Berrio, 30 Apr 1935, Haught 1688 (NY).

PANAMA. Darién: Pico Pedenjo, 15 Mar 1968, Duke 15424 (MO). Panama: El Llano, 1 Sep 1971, Gentry & Tyson 1731 (MO).

Notes—Centrolobium yavizanum is most similar to C. micro-chaete (occurring in Bolivia and southern Brazil), from which it cannot readily be distinguished in flower, though the bracts are generally larger and ovate (vs. smaller and narrowly ovate) and the calyx lobes acuminate rather than acute. In


fruit, it can be distinguished by the greater length of the stipe (20–30 mm vs . 10–15 mm).

Acknowledgments. MDP thanks SYNTHESYS for financial support to visit the Natural History Museum in London and the Royal Botanic Gardens, Kew. DNA sequencing was carried out in the labs of the Royal Botanic Garden, Edinburgh and Utrecht University, The Netherlands. The authors are grateful to Haroldo C. de Lima for providing the study with Centrolobium leaf samples, to Will Goodall Copestake for sequences, and we thank Margaret Tebbs for the beautiful line drawings. The construc-tive and detailed comments of two anonymous reviewers are gratefully acknowledged.

Literature Cited

Acosta-Solis , M. 1947 . Commercial possibilities of the forests of Ecuador–mainly Esmeraldas province . Tropical Woods 89 : 1 – 47 .

Bentham , G. 1839 . Centrolobium Mart. ex Benth . Annalen des Wiener Museums der Naturgeschichte 2 : 95 .

Bentham , G. 1862 . Centrolobium . Pp. 263 – 264 in Flora Brasiliensis 15 part 1 fasc. 29, ed. C. F. P. v. Martius , A. W. Eichler , and I. Urban . Munich : R. Oldenbourg .

Beyra , M. A. and M. Lavin . 1999 . Monograph of Pictetia (Leguminosae - Papillionoideae) and a review of the Aeschynomeneae . SystematicBotany Monographs 56 : 1 – 93 .

Burnham , R. J. 1995 . A new species of winged fruit from the Miocene of Ecuador: Tipuana ecuatoriana (Leguminosae) . American Journal of Botany 82 : 1599 – 1607 .

Doyle , J. J. and J. L. Doyle . 1987 . A rapid DNA isolation procedure for small quantities of fresh leaf tissue . Phytochemical Bulletin 19 : 11 – 15 .

Drummond , A. J. , S. Y. W. Ho , M. J. Phillips , and A. Rambaut . 2006 . Relaxed phylogenetics and dating with confidence . Public Library of Science. Biology 4 : e88 . doi: 10.1371/journal.pbio.0040088

Drummond, A. J. and A. Rambaut . 2007 . BEAST: Bayesian evolution-ary analysis by sampling trees . BMC Evolutionary Biology 7 : 214 . doi:10.1186/1471-2148-7-214

Felsenstein, J. 1981 . Evolutionary trees from DNA sequences: A maximum likelihood approach . Journal of Molecular Evolution 17 : 368 – 376 .

Fitch, W. M. 1971 . Toward defining the course of evolution: minimum change for a specified tree topology . Systematic Zoology 20 : 406 – 416 .

Huelsenbeck, J. P. and F. Ronquist . 2001 . MrBayes: Bayesian inference of phylogenetic trees . Bioinformatics 17 : 754 – 755 .

IUCN . 2001 . IIRL Categories . Criteria : Version 3.1. IUCN Species Survival Commission .

Lavin , M. 2006 . Floristic and geographical stability of discontinuous sea-sonally dry tropical forests explains patterns of plant phylogeny and endemism . Pp. 433 – 447 in Neotropical savannas and seasonally dry for-ests . eds. R. T. Pennington , G. Lewis , and J. Ratter . London : Taylor and Francis .

Lavin, M. , P. S. Herendeen , and M. F. Wojciechowski . 2005 . Evolutionary rates analysis of Leguminosae implicates a rapid diversification of lineages during the Tertiary . Systematic Biology 54 : 575 – 594 .

Lavin, M. , R. T. Pennington , B. B. Klitgaard , J. I. Sprent , H. C. De Lima , and P. E. Gasson . 2001 . The dalbergioid legumes (Fabaceae): delimita-tion of a pantropical monophyletic clade . American Journal of Botany 88 : 503 – 533 .

Lavin , M. , M. Thulin , J.-N. Labat , and R. T. Pennington . 2000 . Africa, the odd man out: molecular biogeography of Dalbergioid Legumes (Fabaceae) suggests otherwise . Systematic Botany 25 : 449 – 467 .

Lima, H. C. D. 1985 . Centrolobium Martius ex Bentham (Leguminosae - Papilionoideae) estudo taxonômico das espécies Brasilieras extra Amazônicas . Arquivos do Jardim Botânicodo Rio de Janeiro 27 : 177 – 191 .

Little Jr., E. L. and R. G. Dixon . 1969 . Árboles comunes de la Provincia de Esmeraldas. i - xii . Rome : FAO .

Lorenzi , H. 1992 . Árvores Brasileiras vol. 1. Manual de indentificação e cul-tivo de plantas arbóreas nativas do Brasil . Nova Odessa, Brazil : Editora Plantarum .

Lorenzi, H. 2002 . Brazilian Trees 2. A guide to the identification and cultivation of Brazilian native trees . Nova Odessa, Brazil : Editora Plantarum .

Mitré, M. 1997 . Centrolobium yavizanum . Pp. 351 in IUCN Red List of Threatened Species .

Neill , D. 2000 . Centrolobium . Pp. 97 in Libro rojo de las plantas endémicas del Ecuador eds. R. Valencia , N. Pitman , S. León-Yánez , and P. M. Jørgensen . Quito : Publicaciones del Herbario QCA, Pontificia Universidad Católica del Ecuador .

Pennington, R. T. , M. Lavin , D. E. Prado , C. A. Pendry , S. K. Pell , and C. A. Butterworth . 2004 . Historical climate change and specia-tion: neotropical seasonally dry forest plants show patterns of both Tertiary and Quaternary diversification . Philosophical Transactions of the Royal Society B. Biological Sciences 359 : 515 – 538 .

Pennington, R. T. , G. Lewis , and J. A. Ratter . 2006 . An overview of the plant diversity, biogeography and conservation of neotropical savan-nas and seasonally dry forests . Pp. 1 – 29 in Neotropical savannas and seasonally dry forests , eds. R. T. Pennington , G. Lewis , and J. Ratter . London : Taylor and Francis .

Pennington, R. T. , D. E. Prado , and C. A. Pendry . 2000 . Neotropical sea-sonally dry forests and Quaternary vegetation changes . Journal of Biogeography 27 : 261 – 273 .

Peralvo, M. , R. Sierra , K. R. Young , and C. Ulloa-Ulloa . 2007 . Identification of biodiversity conservation priorities using predictive modeling: an application for the equatorial region of South America . Biodiversityand Conservation 16 : 2649 – 2675 .

Pittier, H. 1944 . Centrolobium orinocense (Benth.) Pittier . Boletin Tecnico. Ministerio de Agricultura y Cria. Caracas 5 : 123 .

Polhill , R. M. 1981 . Dalbergieae . Pp. 233 – 242 in Advances in legume system-atics, part 1 , eds. R. M. Polhill and P. H. Raven . Richmond, Surrey : Royal Botanic Gardens, Kew .

Polhill, R. M. 1994 . Classification of the Leguminosae . Pp. 35 – 48 in Phytochemical dictionary of the Leguminosae 1 , eds. F. A. Bisby , J. Buckingham , and J. B. Harbourne . London : Chapman and Hall .

Posada , D. and K. A. Crandall . 1998 . Modeltest: testing the model of DNA substitution . Bioinformatics 14 : 817 – 818 .

Prado , D. E. and P. E. Gibbs . 1993 . Patterns of species distributions in the dry seasonal forests of South America . Annals of the Missouri Botanical Garden 80 : 902 – 927 .

Presl, C. 1844 . Botanische Bemerkungen . Abhandlungen der königlichen Bohm Gesellschaft für Wissenschaft 3 : 62 .

Rambaut , A. and A. J. Drummond . 2003 . Tracer, version 1.3. Available from http://beast.bio.ed.ac.uk/Tracer .

Rudd, V. E. 1954 . Centrolobium (Leguminosae): Validation of a specific name and a brief review of the genus . Journal of the Washington Academy of Sciences 44 : 284 – 288 .

Sanderson, M. J. 2002a . Estimating absolute rates of molecular evolution and divergence times: a penalized likelihood approach . MolecularBiology and Evolution 19 : 101 – 109 .

Sanderson , M. J. 2002b . r8s, version 1.50. Distributed by the author, Section of Evolution and Ecology, University of California , Davis .

Savolainen , V. , P. Cuénoud , R. Spichiger , M. D. P. Martinez , M. Crèvecoeur , and J.-F. Manen . 1995 . The use of herbarium specimens in DNA phylogenetics: evaluation and improvement . Plant Systematics and Evolution 197 : 87 – 98 .

Schrire , B. D. , G. P. Lewis , and M. Lavin . 2005 . Biogeography of the Leguminosae . Pp. 21 – 54 in Legumes of the world . eds. G. Lewis, B. Schrire , B. Mackinder , and M. Lock . Richmond, Surrey : Royal Botanic Gardens, Kew .

Simmons, M. P. and H. Ochoterena . 2000 . Gaps as characters in sequence-based phylogenetic analysis . Systematic Biology 49 : 369 – 381 .

Swofford , D. L. 2002 . PAUP*: Phylogenetic Analysis Using Parsimony (*and other methods). Version 4. Sunderland : Sinauer Associates Inc .

Taberlet, P. , L. Gielly , G. Pautou , and J. Bouvet . 1991 . Universal primers for amplification of the three non-coding regions of chloroplast DNA . Plant Molecular Biology 17 : 1105 – 1109 .

Thomas, W. W. and M. R. de Vansconcellos Barbosa . 2008 . Natural veg-etation types in the Atlantic coastal forest of northeastern Brazil . Pp. 6 – 20 in The Atlantic Coastal Forest of northeastern Brazil , ed. W.W. Thomas . Memoirs of the New York Botanical Garden vol 100 . Bronx : New York Botanical Garden .

Appendix 1. Names, vouchers and Genbank accessions for DNA sam-ples used for molecular phylogenetic analyses. A code for Centrolobiumsamples (following the voucher) is used in the text and figures to discern samples of the same species. GenBank accession numbers are in the fol-lowing sequence: trnL - F, matK, ITS, replaced with — where not sampled.

Centrolobium microchaete, (Mart. ex Benth.) Lima, Brazil, Paraná, G. Hatchbach 46089 (F, NY), 769, -, EU401407, -; Centrolobium microchaete(Mart. ex Benth.) Lima, Brazil, Minas Gerais, B. B. Klitgaard 17 (AAU, K), E6, EU401419, EU401408, EU401431; Centrolobium microchaete (Mart. ex Benth.) Lima, Bolivia, Santa Cruz, R. T. Pennington 898 (E), E1, EU401420, EU401409, EU401432; Centrolobium ochroxylum Rose ex Rudd, Ecuador, Los Ríos, B. B. Klitgaard 658 (AAU, K), E7, EU401421, EU401410, EU401433; Centrolobium ochroxylum Rose ex Rudd, Ecuador, Loja, B. B. Klitgaard 551


(AAU), E3, EU401422, EU401411, EU401434; Centrolobium ochroxylum Rose ex Rudd, Ecuador, El Oro, B. B. Klitgaard 421 (AAU, K), E5, -, -, EU401435; Centrolobium paraense Tul., Brazil, Rio de Janeiro, Botanic Garden (cul-tivated), H. C. de Lima 5688 (RB), 770, EU401423, EU401412, EU401436; Centrolobium paraense Tul., Guyana, Rapununi, Jansen-Jacobs 4192 (U), 1278, EU401424, EU401413, EU401437; Centrolobium robustum (Vell.) Mart. ex Benth., Brazil, Rio de Janeiro, Botanic Garden (cultivated), H. C. de Lima2506 (RB), 771, EU401425, EU401414, EU401438; Centrolobium sclerophyl-lum Lima, Brazil, Bahia, Coradin 6358 (K), E24, -, EU401415, EU401439; Centrolobium sclerophyllum Lima, Brazil, Rio de Janeiro, Botanic Garden (cultivated), H. C. de Lima 1635 (K), 772, EU401426, EU401416, EU401440; Centrolobium tomentosum Guill. ex Benth., Brazil, Rio de Janeiro, Botanic Garden (cultivated), H. C. de Lima 2518 (RB), 773, -, EU401417, -; Centrolobium tomentosum Guill. ex Benth., Brazil, Gioás, B. M. T. Walter 3343 (NY), E33, EU401427, EU401418, EU401441; Centrolobium yavizanum Pittier, Panama, Darien, Stern 731 (NY, MO, GH), 775, EU401428, -, EU401442; Geoffroea decorticans (Gillies ex Hook. & Arn.) Burkhart, USA, Arizona (seed source), M. Lavin 750 (MONT), -, AF270880, AF189057; Geoffroea decorticans (Gillies ex Hook. & Arn.) Burkhart, Chile, Gardner & Nees 5823 (E), AF208962, -, -; Grazielodendron riodocense Lima, Brazil, Rio de Janeiro, Botanic Garden (cultivated), H. C. de Lima s.n. (E), AF208952, AF270862, -; Paramachaeriumschomburgkii (Benth.) Ducke, Guyana, Kanuku Mts., Jansen-Jacobs 97 (K), AF208959, AF272062, AF204237; Platymiscium dimorphandrum Donn. Sm., Mexico, J. I. Calzada 14786 (MEXU), -, -, EU401430; Platymiscium floribun-dum Vogel, Brazil, Rio de Janeiro, B. B. Klitgaard 84 (K), -, -, EU401429; Platymiscium sp., Colombia, Antioquia, R. T. Pennington 692 (E), AF208955, AF270871, -; Platymiscium stipulare Benth., Ecuador, Napo, R. T. Pennington 649 (E), -, AF270872, -; Platypodium elegans Vogel, Colombia, Antioquia, R. T. Pennington 688 (E), -, AF270877, -; Platypodium elegans Vogel, Brazil, Gioás, R. T. Pennington 488 (E), AF208961, -, -; Pterocarpus indicus Willd., Phillipines, Luzon, R. T. Pennington 718 (E), AF208953, -, -; Pterocarpus indi-cus Willd., unknown locality, Henderson s.n. (NY), -, AF142691, -; Pterocarpus macrocarpus Kurz, Puerto Rico, Fajardo (cultivated), M. Lavin 721 (MONT), -, AF203588, AF269176; Ramorina girolae Speg., Argentina, Royal Botanic Gardens, Kew (cultivated), (no voucher), AF208957, AF270881, AF204236; Tipuana tipu (Benth.) Kuntze, Argentina, Salta, M. Lavin 5796 (MONT), -, AF270882, AF189056; Tipuana tipu (Benth.) Kuntze, Spain, Barcelona (cul-tivated), R. T. Pennington s.n. (E), AF208956, -, -.

Appendix 2. List of exsiccatae Abbott & Jardim 16395 (1); Abbott16742 (1), 17279 (1); Aguilar et al. 680 (1); Aristeguieta 4710 (3), 7045 (3), 7155(3); Asplund 15387 (2); Barreto 1509 (1); Beck 17203 (1); Belém et al. 954 (1); Belém & Pinheiro 2219 (1), 3392 (6); Bernardi 7386 (3); Blanco 381 (3); Brant1266 (7); Briceño & Rosales 142 (3); Bunting 17 (3), 230 (3), 5196 (3), 5211 (3), 5772 (3), 5773 (3) 7643 (3); Camara et al. s.n. (6); Camp 585 (2); Carabot et al. 4383 (3); Claussen s.n. (6); Coradin et al. 6342 (5), 6358 (5), 8587 (5); Corcovado 15921 (4); Cornejo & Bonifaz 2341 (2); Curran 483 (7); Daly 124 (2); Davis 786

(3); Delgado 105 (2); Diaz et al. 4695 (2), 4878 (2), 5054 (2), 5410 (2), 5787 (2), 6204 (2), 6289 (2), 6432 (2), 6467 (2), 6606 (2), 6714 (2); Dodson & Clendenin 11030 (2); Dodson & Thien 1293 (2); Dodson et al. 6921 (2), 8646 (2), 9651 (2), 14551 (2); Ducke 332 (3), 516 (3), 35506 (3); Dugand 1126 (3); Duke 15424 (7); Elias 1580 (3); Fairchild 2814 (3); Forestry Department of British Guyana 138(3), 2160 (3), 2181 (3); Foster 9940 (3); França & Melo 20331 (6); Froes 19962(1), 20171 (5), 23055 (3); Ganev 3462 (6); Gentry & Berry 15032 (3); Gentry& Dodson 54849 (2); Gentry & Tyson 1731 (7); Gentry 8646 (2), 10306 (3); Glaziou 2539 (6), 5715 (6), 15922 (6); Gottsberger & Gottsberger 9471 (6); Hage1646 (6); Harris et al. 1088 (3); Hartshorn et al. 2763 (2); Hatschbach 15719 (6), 16355 (1), 16427 (6), 46038 (1), 46089 (1), 46250 (1), 52799 (6); Hatschbachet al. 64144 (6); Hatschbach & Zelma 49536 (6); Haught 1688 (7); Helmreishen 89(6); Herbarium Guillem 592 (6); Hoffman 1048 (3); Hohenkerk 849 (3); Hopkinset al. 521 (3); Irwin et al. 12022 (6); 14033 (6); 15685 (6); 19160 (6); 31238 (5); Ivker s.n. (6); Jansen-Jacobs et al. 4012 (3), 4192 (3); Jardim 1370 (1), 1878 (1); Johansen 12 (2); Kinnup et al. 1004 (6); Kirkbride et al. 3581 (6); Klitgaard et al. 17 (1), 27 (6), 319 (2), 421 (2), 551 (2), 658 (2), 67008 (2), 99461 (2), 99487 (2); Koortfor s.n. (4); Koscinski & Pickel 4995 (6); Krukoff 10625 (1); Kuhlmann 3225(3); 31626 (6); Kuniyoshi & Pizani 4644 (1); Lachman et al. 62 (7); Léon 550 (7); Lewis 1420 (3), 1697 (3), (2); Liesner & Gonzales 5419 (3), 5748 (3), 6000 (3), 11077 (3); Liesner et al. 12654 (3); H. C. Lima 1635 (5); H. C. Lima et al. 2622(4), 3986 (1); J. Lima 790 (3); Little 6496 (2), 6557 (2), 6615 (2); Little & Dixon 21175 (2); Louman & Oliviera 8701 (1); Madison et al. 3271 (2), 5232 (2) 5271(2); Mamani & Rodriguez 515 (1); Mamani & Saucedo 616 (1), 819 (1), 875 (1); Martius 160 (4); Matthew 72812 (2), 71882 (2); Mattos et al. 333 (5); Mecenas & Cardoso 87 (6); Medri et al. 578 (6); Menacho & Jiminez 782 (1); Mendonca et al. 136 (1); Meneces & Hartshorn 2365 (1), 2375 (1); Mori et al. 9393 (6); Neill 6192(2); Neill & Nuñez 10472 (2); Neill et al. 10527 (2), 11644 (2); Occhioni 16363(5); Oliveira 43 (6); Palacios et al. 818 (2); Peckolt s.n. or 260 (~Martius 160) (1); Pedra do Cavalo 653 (1); Pendry 674 (1); R. T. Pennington & Carvalho 293 (6); R.T. Pennington 898 (1), 916 (1); T. D. Pennington et al. 15012 (2); Pereira 11718(6); Peter 49720 (2); Pirie & Chatrou 1 (1); Pittier 6572 (7), 6611 (3), 9736 (3), 10514 (3), 11358 (3), 12240 (3); Prance et al. 9562 (3); Quevedo & Centurión 360(1), 504 (1), 609 (1); Raimundo 1120 (1); Ramirez 2472 (3); Ratter et al. 5489 (3); Reidel 464 (4); Reidel & Luschnath 448 (4); Reitz 2931 (1); Reitz & Klein 1877(1); Ribiero 283 (3); Rosa 3119 (3); Rosales et al. 658 (3); Rose & Rose 23370 (2); Ruiz 365 (3); Saldías 377 (1), 688 (1); Samaniego et al. 35 (2); F. S. Santos 3 (6), 4 (5); T. S. Santos, 806 (1), 1899 (1); Schomburgk 314 (3), 590 (3); Seidel & Beck 240 (1); Sello s.n. (6); Silva 58331 (4); Silva et al. 2827 (1); Simpson & Schunke 522 (2); A. C. Smith 3207 (3); D. N. Smith et al. 14429 (1); F. D. Smith 280 (3); Souza 2 (6); Stern et al. 731 (7), 761 (7); Steyermark 54016 (2), 61487 (3), 86772(3), 122979 (3), 123053 (3); Steyermark & Fernández 99547 (3); Steyermarket al. 107725 (3); Tamayo 2106 (3), 3524 (3); Thomas et al. 11906 (6); Toledo et al. 510 (1); Valverde 436 (2); I. G. Vargas C. 2450 (1), 5096 (1); I. G. Vargas C. & Contreras 5096 (1); I. G. Vargas C. et al. 2450 (1); J. A. Vargas 16 (2); Walter et al. 3343 (6); Whitford 10 (3); Whitford & Pinzon 16A (7); Williams 11646 (3), 11832 (3); Wilson-Browne 138 (3); Zarucchi et al. 4957 (7).

revision and bio geography of centrolobium (

Documents