Spore Bearing Vascular

Plants: Ferns tjmedina

Division Pterophyta

• Class Pteropsida• Commonly known as Ferns• Over 10,000 species • Most abundant in the tropics • Generally grow in moist environments but

some species occur in dry habitats• Most species are terrestrial but some are

epiphytic and a few are aquatic.

tjmedinabot3'08

Division Pterophyta• Basic plant parts:

tjmedinabot3'08

frond

pinna

stipe

rachis

crozier

Division Pterophyta

• With megaphylls- has more than one vein in its blade – Associated with the leaf gap and leaf trace

tjmedinabot3'08

Division Pterophyta

tjmedinabot3'08

Division Pterophyta

• Divided into four orders• Based on the organization of the reproductive

structures:– Order Filicales (produce sorus/sori)– Order Ophioglossales (produce strobilus)– Order Marattiales (sorus in synangia)– Order Salviniales (produce sporocarps)

tjmedinabot3'08

Division PterophytaOrder Genera

Order Filicales Nephrolepis

Asplenium

Adiantum

Hemigramma

Pteris

Microsorium

Drynaria

Lygodium

Diplazium

Order Ophioglossales Ophioglossum

Order Marattiales Marattia

Order Salviniales Azolla pinnata

tjmedinabot3'08

Order Filicales

• True ferns (produce sorus/sori)

tjmedinabot3'09

B

s

Order Filicales

tjmedinabot3'08

stalk

sporessporangiumindusium

Order Filicales

• Nephrolepis• Asplenium• Adiantum

tjmedinabot3'08

Order Filicales

• Hemigramma• Pteris• Microsorium

tjmedinabot3'08

Order Filicales

• Drynaria• Lygodium• Diplazium

tjmedinabot3'08

Order Ophioglossales

• Ophioglossum- dimorphic leaves

tjmedinabot3'08

Order Marattiales• Marattia (tree fern); with a vertical stem; with

sorus in synangia (fused sporangia)

tjmedinabot3'08

Order Salviniales• Azolla pinnata (mosquito fern); water ferns

that produce sporocarps

tjmedinabot3'08

Other information about ferns• Exhibit circinate vernation

tjmedinabot3'08

Other information about ferns• Fern stem and root cross sections

tjmedinabot3'08

References:

• www.botany.hawaii.edu• www.home.aone.net.au/~byzantium/ferns/

about.html• www.nhm.ac.uk/hosted_sites/bps/copy.html

tjmedinabot3'08

the end

tjmedinabot3'08