Index of Species Information
SPECIES: Salix monticola
SPECIES: Salix monticola
AUTHORSHIP AND CITATION:
Esser, L. 1992. Salix monticola. In: Fire Effects Information System, [Online].
U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station,
Fire Sciences Laboratory (Producer). Available:
Salix padophylla Rydb.
Salix pseudomonticola var. padophylla (Rydb.) Ball.
NRCS PLANT CODE:
The scientific name of park willow is Salix monticola
Bebb ex. Coult. There are no infrataxa. Hybridization
and introgression with Barclay's willow (S. barclayi), Missouri River
willow (S. eriocephala), and blueberry willow (S. myrtillifolia) may occur
FEDERAL LEGAL STATUS:
No special status
DISTRIBUTION AND OCCURRENCE
SPECIES: Salix monticola
Park willow occurs in the middle and southern Rocky Mountain region from
Wyoming to New Mexico [3,15,35].
|Distribution of park willow. Map courtesy of USDA, NRCS. 2018. The PLANTS Database.
National Plant Data Team, Greensboro, NC. [2018, August 24] .
FRES21 Ponderosa pine
FRES22 Western white pine
FRES23 Fir - spruce
FRES26 Lodgepole pine
AZ CO ID NM WY
BLM PHYSIOGRAPHIC REGIONS:
8 Northern Rocky Mountains
9 Middle Rocky Mountains
10 Wyoming Basin
11 Southern Rocky Mountains
12 Colorado Plateau
13 Rocky Mountain Piedmont
15 Black Hills Uplift
KUCHLER PLANT ASSOCIATIONS:
K008 Lodgepole pine - subalpine forest
K011 Western ponderosa forest
K012 Douglas-fir forest
K013 Cedar - hemlock - pine forest
K017 Black Hills pine forest
K018 Pine - Douglas-fir forest
K021 Southwestern spruce - fir forest
K052 Alpine meadows and barren
SAF COVER TYPES:
201 White spruce
202 White spruce - paper birch
203 Balsam poplar
204 Black spruce
206 Engelmann spruce - subalpine fir
208 Whitebark pine
210 Interior Douglas-fir
215 Western white pine
216 Blue spruce
218 Lodgepole pine
235 Cottonwood - willow
251 White spruce - aspen
252 Paper birch
253 Black spruce - white spruce
254 Black spruce - paper birch
|Park willow along the west fork of the Colorado River. Image by Liz Makings, SEINet.
HABITAT TYPES AND PLANT COMMUNITIES:
Park willow is a common thicket-forming shrub of streambanks and
moist slopes in the arctic and forested regions of Alaska and the Yukon
[3,14]. Park willow can also be found in floodplain thickets on
rivers and grows on recent alluvial deposits characterized by exposed
mineral soil, low moisture content, and absence of permafrost .
Park willow is best adapted to a cool, moist northern environment
but is also found in warmer, more temperate climates. In these more
temperate climates, park willow occurs at middle to rather high
elevations (6,000 to 10,500 feet [1,800-3,100 m]) in the mountains along
riparian zones [14,15,36]. Published classifications describing
park willow as a dominant or codominant in community types are
Classification of the riparian vegetation of the montane and subalpine
zones in western Colorado .
SPECIES: Salix monticola
IMPORTANCE TO LIVESTOCK AND WILDLIFE:
Wildlife: Park willow is an important food source for moose, deer
small mammals, beaver, snowshoe hares, songbirds, and game birds,
including ruffed grouse and ptarmigan [14,26,37]. Park willow from
Wyoming to Alaska provides browse for moose . Honey bees use the
pollen and nectar of park willow as a food source for brood rearing
Livestock: In south-central Colorado, browse suitability ratings for
park willow are listed as high for elk and cattle and moderate for
deer and sheep . Park willow is an important source of browse
for cattle in riparian areas .
Most willows are palatable to livestock and big game . Palatability
of willows increases as the growing season advances .
Park willow characteristically produces dense thickets along streams
and rivers, which provide thermal and hiding cover for elk, deer, and
moose. Branches are used by beavers in the construction of dams and
lodges . Park willow also provides shade and cover for fish
VALUE FOR REHABILITATION OF DISTURBED SITES:
Park willow is useful in stabilizing streambanks and providing
erosion control on severely disturbed sites . Park willow is an
important invader of sites disturbed by man or natural phenomena because
of its ability to produce roots and root crown shoots, which provide for
quick recovery . A study was conducted at Sheep Creek near Fort
Collins, Colorado, a typical western headwater stream. By the late
1940's, the riparian zone bordering Sheep Creek was practically denuded
of vegetation. Three exclosures were built to improve fisheries
habitat. Limited grazing was allowed in the exclosures for 7 of the 30
years the exclosures existed. Park willow cover averaged eight and
a half times greater in the ungrazed exclosures than in adjacent grazed
areas . Park willow was unable to reach its maximum height on
streambanks that had been grazed even though grazing pressure in the
Sheep Creek Allotment had been reduced by two-thirds over a time span of
50 years. It is apparent that some rest from grazing is needed so
healthy stands of willow can establish in riparian zones .
The utilization of willows for riparian habitat improvement is
widespread because they are easy to obtain, inexpensive, usually locally
acclimated, and provide a good benefit/cost ratio .
OTHER USES AND VALUES:
OTHER MANAGEMENT CONSIDERATIONS:
Willow establishment along riparian zones is an effective management
tool that yields positive benefits to a number of fish and wildlife
species, as well as providing necessary protection to the stream
environment . Heavy livestock utilization of riparian areas can
lead to severe degradation unless managed properly .
BOTANICAL AND ECOLOGICAL CHARACTERISTICS
SPECIES: Salix monticola
GENERAL BOTANICAL CHARACTERISTICS:
Park willow is a native, erect shrub 3 to 12 feet (1.5-4 m) tall,
and usually forming dense clumps [3,5]. The trunk of park willow is
smooth or slightly cracked. The wood is fine-grained and soft and has
no sapwood-heartwood line . Park willow has a remarkable
characteristic of plasticity; its growth form adapts readily to a wide
variety of habitats . Branching habit and foliage characteristics
vary greatly depending on site conditions .
RAUNKIAER LIFE FORM:
Sexual reproduction: Park willow is dioecious. The fruit is
contained in a dehiscent capsule that releases many seeds that are then
dispersed by wind or water. Optimum seed production occurs between 2
and 10 years . The flowers of park willow are mostly, but not
exclusively, insect-pollinated. Bees are the chief pollinating agents
[10,14]. The seeds of park willow are short-lived and germinate
immediately on moist mineral substrates with high relative humidity and
in full sunlight . Germination is inhibited on sites with a
continuous cover of tree litter [7,14]. Seed germination occurs over a
broad temperature range, from 41 to 77 degrees Fahrenheit (5-25 deg C).
This appears to be a compensatory mechanism because of the short seed
life [7,41]. This adaptation to a wide range of temperatures is
particularly important in interior Alaska, where surface soil
temperatures may vary over a relatively wide range .
Vegetative reproduction: Park willow sprouts readily from the root
crown or basal stem [14,32]. It will root from stem cuttings or root
fragments on moist to wet sites. Park willow will sprout vigorously
following cutting regardless of cutting season, but vigor is more
pronounced if cutting occurs during the dormant season [7,14]. Mountain
willow exhibits early growth from both seed and sprout; but vegetative
reproduction of willow was six times greater than willow growing from
seed on a 6-year-old burn in Alaska .
In Alaska and northern Canada, park willow is found in wet areas
such as heaths, riverbeds, and streams . In interior Alaska,
park willow occurs in glacial drift and on river floodplains that
are nutrient-rich . The best growth occurs in moist, alluvial
bottomlands, but park willow can be found growing on a variety of
substrates. In the Intermountain region, park willow is best
represented in riparian communities within the middle-to upper-elevation
forest of subalpine fir (Abies lasiocarpa) and in the forest-alpine
transition zone above the limit of contiguous forests, dominated by
whitebark pine (Pinus albicaulis) .
Soils: Park willow is usually found on moist sandy or gravelly
soils but is adaptable to a wide variety of soils . It will
tolerate moderately alkaline soils but does poorly in extremely acidic
of alkaline conditions. The general pH range for willows is 5.5 to 7.5
. Growth of park willow is severely reduced when water levels
are maintained at or above the root collar for extended periods .
Park willow is also shade intolerant and grows best in full sunlight
Plant associates: Park willow is commonly associated with Booth
willow (Salix boothii), Geyer willow (Salix geyeriana), Drummond willow
(Salix drummondiana), alder (Alnus spp.), river birch (Betula
occidentalis), lichens (Cladonia spp.), bluejoint reedgrass
(Calamagrostis canadensis), beaked sedge (Carex rostrata), water sedge
(Carex aquatilis), rush (Juncus spp.), bluegrass (Poa spp.), and mosses
(Polytrichum spp.) [4,16,29].
Park willow occurs in initial to early seral plant communities along
river systems of interior Alaska. Park willow is a pioneer species
that becomes established after disturbances such as fire, logging or
recent alluvial deposits resulting from floodplain processes .
Park willow has low shade tolerance and therefore loses dominance on
sites that are heavily forested or succeeded by more shade-tolerant
Park willow flowers in May, before the leaves appear, through July
. The fruit ripens soon after flowering, followed by seed dispersal
in early to midsummer [14,41].
SPECIES: Salix monticola
FIRE ECOLOGY OR ADAPTATIONS:
Park willow is a fire-tolerant shrub that sprouts readily from from
the root and root crown after being top-killed by fire [19,23]. It
produces numerous, minute seeds that are dispersed by wind, and which
are important in colonizing recently burned areas . Willows that
invade by seeding-in have a slower growth rate than those that sprout
from the root crown after fire .
Find fire regime information for the plant communities in which this
species may occur by entering the species name in the FEIS home page under
"Find Fire Regimes".
POSTFIRE REGENERATION STRATEGY:
Small shrub, adventitious-bud root crown
Ground residual colonizer (on-site, initial community)
Secondary colonizer - off-site seed
SPECIES: Salix monticola
IMMEDIATE FIRE EFFECT ON PLANT:
Park willow is a fire-tolerant shrub that has a rapid postfire
regeneration period . It will sprout readily from the root or root
crown after being top-killed by fire. Frequent fires can eventually
deplete carbohydrate levels below minimums necessary for growth and
reflowering and eliminate park willow .
PLANT RESPONSE TO FIRE:
Park willow is frequently found in early successional stage plant
communities after fires because of its ability to sprout vigorously from
the root-crown or roots . Park willow seeds need a
nutrient-rich mineral seedbed to germinate. The chance of mountain
willow establishing after a fire lessens as available mineral soil
seedbeds become occupied by faster growing herbaceous species and mosses
. Park willow is greatly favored by fire in most habitats and it
can become the dominant cover in areas that have a history of frequent
natural fire . Fire is not favored in lowland spruce stands in
Alaska because of the prevalent green understory, mainly willows .
Fire severity affects the mode of willow postfire recovery. Following
light-severity fires most willows recover quickly, sending up new shoots
from undamaged root crowns. Few if any seedlings establish following
this type of fire because the partially consumed organic soil layers
comprise an unfavorable seedbed. Following severe fire, however, the
primary mode of recovery is seedling establishment. Severe fires that
burn into organic soils kill willows, but expose mineral soils which
provide excellent seedbeds .
FIRE MANAGEMENT CONSIDERATIONS:
Prescribed fire is widely used as a wildlife management tool to
rejuvenate decadent willow stands and stimulate sprouting . Early
seral communities created by fire can increase the carrying capacity of
winter range for moose in interior Alaska . Fires increase the
amount of browse available for herbivores because browse species such as
willow proliferate in early postfire succession . Recurring fires
within some parts of the boreal forest have allowed aspen and willow to
replace coniferous forests . The tendency of willows to expand
quickly following fires and other disturbances and to form dense
thickets inhibits natural regeneration of conifers. Prescribed burning
can reduce initial competition from willow in areas to be planted with
cultivated species .
SPECIES: Salix monticola
1. Anderson, E. William; Bedell, Thomas E. 1987. Northwest common-name
check list of plants. Special Report 786. Corvallis, OR: Oregon State
University, Agricultural Experiment Station. 45 p. 
2. Argus, George W. 1957. The willows of Wyoming. University of Wyoming
Publications. 21(1). Laramie, WY: University of Wyoming, Publications in
Science. 63 p. 
3. Argus, George W. 1973. The genus Salix in Alaska and the Yukon.
Publications in Botany, No. 2. Ottawa, ON: National Museums of Canada,
National Museum of Natural Sciences. 279 p. 
4. Baker, William L. 1989. Classification of the riparian vegetation of the
montane and subalpine zones in western Colorado. Great Basin Naturalist.
49(2): 214-228. 
5. Brayshaw, T. Christopher. 1976. Catkin bearing plants of British
Columbia. Occas. Pap. No. 18. Victoria, BC: The British Columbia
Provincial Museum. 176 p. 
6. Brunsfeld, Steven J.; Johnson, Frederic D. 1985. Field guide to the
willows of east-central Idaho. Bulletin Number 39. Moscow, ID:
University of Idaho; College of Forestry, Wildlife and Range Sciences;
Forest, Wildlife and Range Experiment Station. 82 p. 
7. Densmore, Roseann; Zasada, John. 1983. Seed dispersal and dormancy
patterns in northern willows: ecological and evolutionary significance.
Canadian Journal of Botany. 61: 3207-3216. 
8. Dorn, Robert D. 1970. The willows of Montana. Bozeman, MT: Montana State
University, Department of Botany and Microbiology. 18 p. 
9. Dorn, Robert D. 1975. A systematic study of Salix section Cordatae in
North America. Canadian Journal of Botany. 53: 1491-1522. 
10. Dorn, Robert D. 1976. A synopsis of American Salix. Canadian Journal of
Botany. 54: 2769-2789. 
11. Dorn, Robert D. 1977. Willows of the Rocky Mountain States. Rhodora. 79:
12. Eyre, F. H., ed. 1980. Forest cover types of the United States and
Canada. Washington, DC: Society of American Foresters. 148 p. 
13. Garrison, George A.; Bjugstad, Ardell J.; Duncan, Don A.; [and others].
1977. Vegetation and environmental features of forest and range
ecosystems. Agric. Handb. 475. Washington, DC: U.S. Department of
Agriculture, Forest Service. 68 p. 
14. Haeussler, S.; Coates, D.; Mather, J. 1990. Autecology of common plants
in British Columbia: A literature review. Economic and Regional
Development Agreement FRDA Rep. 158. Victoria, BC: Forestry Canada,
Pacific Forestry Centre; British Columbia Ministry of Forests, Research
Branch. 272 p. 
15. Hitchcock, C. Leo; Cronquist, Arthur. 1964. Vascular plants of the
Pacific Northwest. Part 2: Salicaceae to Saxifragaceae. Seattle, WA:
University of Washington Press. 597 p. 
16. Hobbs, N. Thompson; Baker, Dan L.; Ellis, James E.; Swift, David M.
1981. Composition and quality of elk winter diets in Colorado. Journal
of Wildlife Management. 45(1): 156-171. 
17. Holmgren, Arthur H.; Reveal, James L. 1966. Checklist of the vascular
plants of the Intermountain Region. Res. Pap. INT-32. Ogden, UT: U.S.
Department of Agriculture, Forest Service, Intermountain Forest and
Range Experiment Station. 160 p. 
18. Kartesz, John T.; Kartesz, Rosemarie. 1980. A synonymized checklist of
the vascular flora of the United States, Canada, and Greenland. Volume
II: The biota of North America. Chapel Hill, NC: The University of North
Carolina Press; in confederation with Anne H. Lindsey and C. Richie
Bell, North Carolina Botanical Garden. 500 p. 
19. Kramp, Betty A.; Patton, David R.; Brady, Ward W. 1983. The effects of
fire on wildlife habitat and species. RUN WILD: Wildlife/ habitat
relationships. Albuquerque, NM: U.S. Department of Agriculture, Forest
Service, Southwestern Region, Wildlife Unit Technical Report. 29 p.
20. Kuchler, A. W. 1964. Manual to accompany the map of potential vegetation
of the conterminous United States. Special Publication No. 36. New York:
American Geographical Society. 77 p. 
21. Lackschewitz, Klaus. 1986. Plants of west-central
Montana--identification and ecology: annotated checklist. Gen. Tech.
Rep. INT-217. Ogden, UT: U.S. Department of Agriculture, Forest Service,
Intermountain Research Station. 128 p. 
22. LeResche, R. E.; Bishop, R. H.; Coady, J. W. 1974. Distribution and
habitats of moose in Alaska. Le Naturaliste Canadien. 101: 143-178.
23. Lutz, H. J. 1956. Ecological effects of forest fires in the interior of
Alaska. Tech. Bull. No. 1133. Washington, DC: U.S. Department of
Agriculture, Forest Service. 121 p. 
24. Lyon, L. Jack; Stickney, Peter F. 1976. Early vegetal succession
following large northern Rocky Mountain wildfires. In: Proceedings, Tall
Timbers fire ecology conference and Intermountain Fire Research Council
fire and land management symposium; 1974 October 8-10; Missoula, MT. No.
14. Tallahassee, FL: Tall Timbers Research Station: 355-373. 
25. Machida, Steven. 1979. Differential use of willow species by moose in
Alaska. Fairbanks, AK: University of Alaska. 97 p. Thesis. 
26. McCluskey, D. Cal; Brown, Jack; Bornholdt, Dave; [and others]. 1983.
Willow planting for riparian habitat improvement. Tech. Note 363.
Denver, CO: U.S. Department of the Interior, Bureau of Land Management.
21 p. 
27. Nickerson, Mona F.; Brink, Glen E.; Feddema, Charles, compilers. 1977.
Principal range plants of the central and southern Rocky Mountains:
names and symbols. Gen. Tech. Rep. RM-20. Fort Collins, CO: U.S.
Department of Agriculture, Forest Service, Rocky Mountain Forest and
Range Experiment Station. 121 p. 
28. Olson, R. A.; Gerhart, W. A. 1982. A physical and biological
characterization of riparian habitat and its importance to wildlife in
Wyoming. Cheyenne, WY: Wyoming Game and Fish Department. 188 p. 
29. Padgett, Wayne G.; Youngblood, Andrew P.; Winward, Alma H. 1989.
Riparian community type classification of Utah and southeastern Idaho.
R4-Ecol-89-01. Ogden, UT: U.S. Department of Agriculture, Forest
Service, Intermountain Region. 191 p. 
30. Powell, David C. 1988. Aspen community types of the Pike and San Isabel
National Forests in south-central Colorado. R2-ECOL-88-01. Denver, CO:
U.S. Department of Agriculture, Forest Service, Rocky Mountain Region.
254 p. 
31. Ferguson, Dennis E.; Boyd, Raymond J. 1988. Bracken fern inhibition of
conifer regeneration in northern Idaho. Ogden, UT: U.S. Department of
Agriculture, Forest Service, Intermountain Research Station. 11 p.
32. McCune, Bruce. 1982. Site, history and forest dynamics in the Bitterroot
canyons, Montana. Madison, WI: University of Wisconsin. 166 p. Thesis.
33. Schulz, Terri Tucker; Leininger, Wayne C. 1990. Differences in riparian
vegetation structure between grazed areas and exclosures. Journal of
Range Management. 43(4): 295-299. 
34. Stephens, H. A. 1973. Woody plants of the North Central Plains.
Lawrence, KS: The University Press of Kansas. 530 p. 
35. U.S. Department of Agriculture, Natural Resources Conservation Service. 2018.
PLANTS Database, [Online]. U.S. Department of Agriculture, Natural Resources
Conservation Service (Producer). Available: https://plants.usda.gov/. 
36. Weldon, Lyle W. 1956. A study of Artemisia tridentata Nutt. seedlings in
relation to chemical control. Laramie, WY: University of Wyoming. 36 p.
M.S. thesis. 
37. Van Dersal, William R. 1938. Native woody plants of the United States,
their erosion-control and wildlife values. Washington, DC: U.S.
Department of Agriculture. 362 p. 
38. Viereck, Leslie A.; Little, Elbert L., Jr. 1972. Alaska trees and
shrubs. Agric. Handb. 410. Washington, DC: U.S. Department of
Agriculture, Forest Service. 265 p. 
39. Wolff, Jerry O. 1976. Utilization of hardwood browse by moose on the
Tanana flood plain of interior Alaska. Res. Note PNW-267. Portland, OR:
U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest
and Range Experiment Station. 7 p. 
40. Wolff, Jerry O. 1978. Burning and browsing effects on willow growth in
interior Alaska. Journal of Wildlife Management. 42(1): 135-140. 
41. Zasada, J. C.; Viereck, L. A. 1975. The effect of temperature and
stratification on germination on selected members of Salicaceae in
interior Alaska. Canadian Journal of Forest Research. 5(2): 333-337.
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