firewise plants powerpoint - forestry | usu
TRANSCRIPT
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Firewise Plants
Dr. Mike KuhnsUtah State UniversityExtension Forester
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How do we achieve firewise landscapes –pavement and rocks?
Photo: Mike Kuhns, USU
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Doonesbury (c) 1993 G.B.Trudeau. Used by permission of Universal Press Syndicate. All rights reserved.
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No, but we can do better than…
Photo: Mike Kuhns, USU
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Overview
n Why firewise landscapes?n What makes landscapes firewise?q plants with firewise characteristicsq appropriate placementq management, maintenance
n What are characteristics of firewise plants?n Some plant examples
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Terminology
n Firewiseq less likely to burnq or will burn less hot or for less timeq may imply low maintenance, slow growth
n Don’t use terms fire-safe or fireproof – all plants will burn under extreme conditions
n Fire resistant OK
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Wildland/Urban Interface
n Between core rural and urban areasn Popular for housing and recreationn Increasing pressure throughout the Westn Problems with wildlife, water quality, and fire
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Popularity=Problems
n Attractive natural (and introduced) vegetation
n Fire often natural part of landscape
n Access and infrastructure problems
n Minor fires become major concerns
Photo: Mike Kuhns, USU
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Solutions
n Community leveln Development leveln Individual level
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Community Level
n Planning & zoning*n Infrastructure requirementsn Demonstration homes, landscapes*n Ordinances*
*Affect/affected by plants & landscaping
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Development Level
n Development location, layout*n Fuel breaks*n Water suppliesn Buried utilitiesn Street, home signsn Covenants that help*n Education, awareness**Affect/affected by plants & landscaping
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Individual Level
n Building designn Building placement, access*n Landscaping, maintenance*n Water supply*n Readiness*
*Affect/affected by plants & landscaping
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Firewise Landscaping
n Designing, installing, and maintaining landscapes to…q minimize fire hazard to structures, residents, and
neighborsq maintain components of native ecosystemsq achieve owner’s goals
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Firewise Plants and Landscaping Don’t Guarantee Fire Safetyn All plants will burnn Firewise plants, good design, and
maintenance help establish a defensible space and reduce fire intensity near structure
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Defensible Space
n Use of 3-4 zones, lightly-managed natural veg. to heavily managed landscape near structureq Zone 1 -- well-irrigated area near structure at least 30' on
all sides; space for fire suppression equipment; plantings should be carefully spaced firewise species.
q Zone 2 -- firewise plant materials should be used here; only low-growing plants; irrigation needed.
q Zone 3 -- low-growing plants and well-spaced trees; keep volume of vegetation (fuel) low.
q Zone 4 -- furthest from structure; natural; thin selectively, remove highly flammable vegetation.
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Important Points About Firewise Plants
n No plant is fireproof. All will burn in intense fire.n Firewise plants have one or more of these traits:
q Tissues contain more moisture, especially during fire season.q Tissues contain low amounts of volatile oils and other readily
flammable chemicals.q Provide less fuel, by producing less litter or by staying small.q Compact or low to the ground; can be used in landscape to
interrupt fire pathways.
n Firewise plants generally low to ground, compact, and stay green and healthy with low maintenance and minimal water.
n They interrupt at least one leg of the fire triangle
Heat
Oxygen
Fuel
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Important Points About Firewise Plants and Their Managementn Trees provide large amounts of fuel; carefully place
and maintain.n Broadleaved trees generally less flammable than
conifers (pines, firs, spruces, junipers).n Most do well in sunny areas typical of some fire-
prone sites.n Some need minimal or no irrigation; over-irrigation
can harm or cause fast growth. Some require irrigation.
n Some can be weedy in certain circumstances.n Consider plant availability and cold-hardiness.
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Firewise Landscaping Isn’t Easy
n Need to know plant needs and habits so you can use and manage them appropriately.
n Good looking firewise landscapes aren’t easy to design or maintain; takes considerable expertise.
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Firewise Landscaping Isn’t Easy
n Safe, but natural or attractive?Photo: Mike Kuhns, USU
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Firewise Landscaping Isn’t Easy
n Right is safer; left more natural & more attractive to some (note wood roof)
Photo: Mike Kuhns, USU
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Firewise Plant Maintenance
n Remove dead leaf and stem material within crown.n Remove litter on the ground.n Prune to thin crowns; prune trees 6’ to 10’ up.n Thin shrub crowns.n Remove individuals or groups of plants to break up
fuel continuity.n Irrigate appropriately.n Remove debris from site.
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Firewise Plant Maintenance
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Firewise Plants
n Grassesn Herbaceous perennialsn Shrubs, vinesn Trees
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Firewise Plants -- Grasses
n Most low growingn Some need to be mowed or grazed
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Crested Wheatgrass (Agropyron cristatum)
n Resists fire spread due to growth form
Photos: Montana State Herbarium, Matt Lavin
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Western Wheatgrass (Agropyron smithii)
n Low fuel loads; regrows quickly after fire
Photo: Wisconsin State Herbarium, Robert Freckmann
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Buffalograss (Buchloe dactyloides)n Low growing w/out mowing; green
in summer with minimal irrigation
Photos: Paul Johnson, USU
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Orchardgrass (Dactylis glomerata)
n Mow or graze
Photos: Forage Info. System, Oregon State Univ.
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Blue Fescue (Festuca cinerea and others)
n Most low growing; may need to mow; moist w/ irrigation
Photos: Mike Kuhns, USU
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Rye Grass (Lolium species)
n Green w/ less irrigation than some; mow or graze
Photo: www.agronomy.psu.edu/Extension/Turf/TurfExt.html
L. perennePhoto: Wisconsin State Herbarium, Robert Freckmann
L. perenne
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Kentucky Bluegrass (Poa pratensis)
n Low growing; mow; moist with irrigation
Photo: Mike Kuhns, USU
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Sandberg Bluegrass (Poa secunda or sandbergii)
n Low growing w/out mowing; low fuel loads
Photo: www.pnl.gov/ecology
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Firewise Plants -- Herbaceous Perennials
n Grow back from underground parts every year
n Not woody
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Yarrow (Achillea clavennae, filipendulina, etc.)
n Good for dry sites; varying sizes; not all good
Photos: Mike Kuhns, USU
A. millefolium A. filipendulina
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Columbine (Aquilegia species, hybrids)
n Likes moisture & some shade
Photos: Mike Kuhns, USU
A. caerulaea
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Sea Pink, Sea Thrift (Armeria maritima)
n Low growing; dry infertile sites only; salt tolerant
Photos: Dept. Horticulture, Oregon State Univ.
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Beach Wormwood, Dusty Miller (Artemisia stelleriana)n Very well-
drained soil; moist in summer; annual in colder areas
Photo: Mike Kuhns, USU
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Bergenia (Bergenia species, hybrids)
n Moisture loving; medium sized; semi-evergreen
B. purpurescensPhoto: Mike Kuhns, USU
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Red Valerian, Jupiter’s Beard (Centranthus ruber)n Gets fairly large; moist in summer
Photos: Mike Kuhns, USU
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Snow-in-summer (Cerastium tomentosum)
n Low growing; moist in summer
Photos: Mike Kuhns, USU
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Coreopsis (perennial Coreopsis species)
n C. auriculata var. ‘Nana’ low growing, needs water; others larger, drought tolerant
Photos: Mike Kuhns, USU
C. grandiflora
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Hardy Ice Plant (Delosperma nubigenum; also other hardy species)n Very drought tolerant; low growing; some not
cold hardy
D. nubigenumPhoto: U. Innsbruck Botanical Garden Photo: Copyright Markku Savela
D. cooperi
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Pinks (Dianthus species)
n Use perennials; need moisture; moist in summer
Photos: Mike Kuhns, USU
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Fleabane (Erigeron species, hybrids)
n Moist in summer
Photos: Texas A&M Bioinformatics Working Group, James Reveal, James Manhart
E. peregrinus
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Blanket Flower (Gaillardia x grandiflora)
n Drought, heat tolerant; moist in summer; large
‘Rosa Triumph’‘Kobald’Photos: Mike Kuhns, USU
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Geranium (Geranium species)n Most low-growing; need shade where hot;
moist in summer; use perennials
Photo: Mike Kuhns, USU
G. cinereumG. viscosissimum
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Daylily (Hemerocallis species)
n Green and moist in summer
Photos: Mike Kuhns, USU
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Coral Bells, Alum Root (Heuchera sanguineaand others)n Several species, many hybrids; low growing
foliage
Photos: Mike Kuhns, USU
H. micranthaH. sanguinea
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Evergreen Candytuft (Iberis sempervirens)
n Fairly low growing; evergreen
Photos: Mike Kuhns, USU
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Iris (Iris species, hybrids)
n Green and moist in summer
I. pseudacorus I. virginicaPhotos: Wisconsin State Herbarium, Paul Drobot, Robert Freckmann
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Red-hot Poker (Kniphofia species, hybrids)
n Large plants; moist in summer
Photos: Mike Kuhns, USU
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Lavender (Lavandula species)
n Moist in summer; compact; cut to ground regularly
Photos: Mike Kuhns, USU
L. pedunculataL. angustifolia
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Shasta Daisy (Leucanthemum x superbum)
n Green and moist in summer
Photos: Mike Kuhns, USU
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Sea Lavender, Statice (Limonium latifolium)
n Low growing leaves; salt resistant; dry soils
Photos: David Graper, SDSU
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Flax (Linum species)
n Good for tough sites & soils
L. flavum var. compactumPhoto: Mike Kuhns, USU
L. perennePhoto: Wisconsin State Herbarium, Emmet Judziewicz
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Lily-turf (Liriope spicata)
n Fairly low growing; moist or dry sites; evergreen
Photo: www.uky.edu/Ag/Horticulture/gardenflowers
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Lupine (Lupinus species, hybrids)
n Some are annuals; poisonous to livestock; good for poor soils
Photos: Mike Kuhns, USU
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Alfalfa (Medicago sativus)
n Green & moist in summer; low growing
Photos: Mike Kuhns, USU
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Primrose (Oenothera species)
n Fairly low growing; best on poor soils
Photo: Mike Kuhns, USU
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Poppy (Papaver species)
n Easy to grow; cut back regularly
Photos: Texas A&M Bioinformatics Working Group, Hugh Wilson
P. orientaleP. orientale
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Penstemon (Penstemon species, hybrids)
n Use on well-drained soils
Photos: Mike Kuhns, USU
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Russian Sage, Azure Sage (Perovskia atriplicifolia)n Moist in summer; cut
back yearly
Photos: Dept. Horticulture, Oregon State Univ.
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Cinquefoil, Potentilla (Potentilla species, hybrids)n Use low-growing,
non-shrubby species; full-sun
P. gracilisPhoto: Wisconsin State Herbarium, Emmet Judziewicz
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Salvia, Sage (Salvia species, hybrids)n Some are annuals;
use low-growing, small plants; Mediterranean sage is weedy
S. pratensisPhotos: Wisconsin State Herbarium, Emmet Judziewicz
S. pratensis
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Stonecrop, Sedum (Sedum species)
n Low growing; fleshy, moist leaves; drought tolerant
Photos: Mike Kuhns, USU
S. albumS. album
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Hen and Chicks (Sempervivum tectorum and other species)n Very low-
growing; succulent; good on droughty, poor soils
Photo: Mike Kuhns, USU
S. tectorum
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Lamb’s Ear (Stachys byzantina)
n Moist in summer; good on poor soils
Photos: Mike Kuhns, USU
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Yucca (Yucca filamentosa)
n Evergreen; very drought tolerant
Photo: Mike Kuhns, USU
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Firewise Plants -- Shrubs, Vines
n Woody; grows out from above-ground stemsn Many low growing; slow growing
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Bearberry, Kinnikinnick, Manzanita (Arctostaphylos uva-ursi)n V. low, spreading; evergreen; needs little
pruning; salt & poor soil tolerant
Photos: Wisconsin State Herbarium, Eric Epstein, Robert Kowal
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Saltbush (Atriplex species)
n Very drought tolerant; low maintenance
Photos: Range Plants of Utah Web Page, USU
A. gardneri A. canescens
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New Jersey Tea (Ceanothus americanus)n Low, dense; ever-
green; fairly trouble-free; drought tolerant
Photos: Wisconsin State Herbarium, Kenneth Sytsma
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Ceanothus (Ceanothus herbaceus and others)
n Fairly low growing; evergreen; low maintenance
Photo: Wisconsin State Herbarium, Stephen Solheim
C. herbaceus
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Rock-rose (Cistus species)
n Not all are cold hardy; evergreen; dry sites; size varies
C. x corbariensisC. x corbariensisPhotos: Dept. Horticulture, Oregon State Univ.
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Cotoneaster (Cotoneaster horizontalis, C. dammeri, and other species)n Use low-growing, compact forms; some are
evergreen; dry sites; low maintenance; tough
Photo: Dept. Horticulture, Oregon State Univ.
C. horizontalisPhoto: Mike Kuhns, USU
C. divaricatus
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English Ivy (Hedera helix)
n Evergreen vine; low growing, spreading, climbing; prune to control spread; sun or shade
Photos: Mike Kuhns, USU
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Immigrant Forage Kochia (Kochia prostrata)
n Shrub that stays green most of year; no volatiles; grows in clumps that break up fuel continuity; don’t confuse with weedy annual kochia (K. scoparia)
Photo: www.agx.usu.edu Photo: Steve Dewey, USU
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Honeysuckle (Lonicera species, hybrids)
n Shrubs or vines; use low-growing species/cvs.
Photos: Wisconsin State Herbarium, Robert Bierman, Michael Clayton
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Creeping Oregon-grape (Mahonia repens)
n Low growing, spreading shrub; evergreen; needs some shade
Photos: Mike Kuhns, USU
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Virginia Creeper (Parthenocissus quinquefolia)
n Vine; tough and very adaptable; prune to control spread
Photos: Mike Kuhns, USU
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Sand Cherry (Prunus besseyi)
n Small, spreading shrub for dry, tough sites
Photo: www.ext.colostate.edu/psel
P. besseyi ‘Pawnee Buttes’
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Bitterbrush, Antelope Bitterbrush (Purshia tridentata)n Low maintenance; good for dry, tough sites
P. besseyi ‘Pawnee Buttes’Photos: www.cnr.vt.edu/dendro/wwwmain.html; Virginia Tech Dendrology
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Firethorn, Pyracantha (Pyracantha species)
n Evergreen shrub; use low-growing selections; prune regularly
P. coccineaPhotos: Dept. Horticulture, Oregon State Univ.
P. coccinea
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Buckthorn (Rhamnus species)
n Tough shrub; low maintenance
R. frangula ‘Columnaris’ R. frangula ‘Columnaris’Photos: Mike Kuhns, USU
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Skunkbush Sumac and other Sumacs (Rhus trilobata and other species)n Skunkbush small, easy to grow, low
maintenance; some get large; thin & prune; drought tolerant
R. trilobataR. trilobataPhotos: Mike Kuhns, USU
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Currant, Gooseberry (Ribes species)
n Use low-growing dwarf forms; fairly tough; adaptable
R. aureumR. aureumPhotos: Mike Kuhns, USU
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Shrub Roses (Rosa rugosa, R. woodsii, and other species)n Medium shrub; tough; fairly drought and salt
tolerant
R. woodsiiPhotos: Mike Kuhns, USU
R. woodsii
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Russet Buffaloberry (Shepherdia canadensis)n Tolerant of drought
& very poor soils; fixes nitrogen; salt tolerant
Photos: Wisconsin State Herbarium, Emmet Judziewicz, Robert Read
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Lilac (Syringa vulgaris)
n Small to large shrubs; green in summer with irrigation; thin & prune regularly
Photo: Mike Kuhns, USU
var. ‘Katherine Havenmeyer’
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Large Periwinkle (Vinca major)
n Low growing, prostrate ground cover; sun or shade; evergreen
Photos: Texas A&M Bioinformatics Working Group, James Manhart
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Dwarf Periwinkle, Common Periwinkle (Vinca minor)n Similar to large periwinkle, but very low to
the ground
Photos: UConn Plant Database
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Firewise Plants -- Trees
n Many will need supplemental moisturen Large woody plants; lots of fueln Use moist, broadleaved trees; not conifersn Pruning branches up from ground importantn Break up large, continuous wooded areas
near area to be protected
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Firewise Plants -- Trees
n Maple (Acer)n Birch (Betula)n Redbud (Cercis)n Aspen, Cottonwood, Poplar (Populus)n Willows (Salix)
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Other Firewise Resources
n Firewise Plants for Utah Landscapes fact sheet from USU Extension or at www.extension.usu.edu/publica/natrpub2.htm
n Firewise Web Page at www.firewise.org
n Mike Kuhns, Extension Forestry, 5230 Old Main Hill, USU, Logan, UT 84322-5230; [email protected]