Index of Species Information
SPECIES: Viburnum edule
SPECIES: Viburnum edule
AUTHORSHIP AND CITATION :
Matthews, Robin F. 1992. Viburnum edule. In: Fire Effects Information System, [Online].
U.S. Department of Agriculture, Forest Service,
Rocky Mountain Research Station, Fire Sciences Laboratory (Producer).
Available: http://www.fs.fed.us/database/feis/ .
Viburnum pauciflorum LaPylaie
Viburnum opulus var. edule Michx.
Viburnum acerifolium Bong.
SCS PLANT CODE :
COMMON NAMES :
few-flowered highbush cranberry
The currently accepted scientific name of highbush cranberry is Viburnum
edule (Michx.) Raf., in the family Caprifoliaceae [1,18,32,35,47].
There are no recognized subspecies, varieties, or forms.
LIFE FORM :
FEDERAL LEGAL STATUS :
See OTHER STATUS
OTHER STATUS :
Highbush cranberry is considered rare (species or habitat vulnerable or
declining) in South Dakota . It has also been placed on Maine's
official Watch List .
DISTRIBUTION AND OCCURRENCE
SPECIES: Viburnum edule
GENERAL DISTRIBUTION :
Highbush cranberry is distributed throughout Alaska and across Canada to
Newfoundland. It occurs south through the New England and Great Lakes
States, and the Pacific Northwest [1,18,45,49,58]. Populations are also
found in Idaho, Montana, North and South Dakota, Wyoming, and Colorado
FRES10 White - red - jack pine
FRES11 Spruce - fir
FRES19 Aspen - birch
FRES23 Fir - spruce
FRES24 Hemlock - Sitka spruce
FRES26 Lodgepole pine
FRES28 Western hardwoods
AK CO CT ID IA ME MD MA MI MN
MT NH NY ND OR PA RI SD VT WA
WI WY AB BC LB MB NB NF NT NS
ON PE PQ SK YT
BLM PHYSIOGRAPHIC REGIONS :
1 Northern Pacific Border
2 Cascade Mountains
8 Northern Rocky Mountains
9 Middle Rocky Mountains
11 Southern Rocky Mountains
15 Black Hills Uplift
KUCHLER PLANT ASSOCIATIONS :
K001 Spruce - cedar - hemlock forest
K004 Fir - hemlock forest
K008 Lodgepole pine - subalpine forest
K015 Western spruce - fir forest
K025 Alder - ash forest
K093 Great Lakes spruce - fir forest
K094 Conifer bog
K095 Great Lakes pine forest
K096 Northeastern spruce - fir forest
K107 Northern hardwoods - fir forest
K108 Northern hardwoods - spruce forest
SAF COVER TYPES :
1 Jack pine
5 Balsam fir
12 Black spruce
13 Black spruce - tamarack
17 Pin cherry
18 Paper birch
107 White spruce
201 White spruce
202 White spruce - paper birch
203 Balsam poplar
204 Black spruce
205 Mountain hemlock
206 Engelmann spruce - subalpine fir
218 Lodgepole pine
222 Black cottonwood - willow
224 Western hemlock
227 Western redcedar - western hemlock
228 Western redcedar
251 White spruce - aspen
252 Paper birch
253 Black spruce - white spruce
254 Black spruce - paper birch
SRM (RANGELAND) COVER TYPES :
HABITAT TYPES AND PLANT COMMUNITIES :
Highbush cranberry may occur as a dominant or codominant understory
species in open or closed coniferous forests, primarily in white spruce
(Picea glauca) [12,19,50,57], but also in lodgepole pine (Pinus
contorta)  or western redcedar (Thuja plicata) habitats . It may
also occur as an understory dominant in open or closed deciduous forests
with quaking aspen (Populus tremuloides), paper birch (Betula
papyrifera), or balsam poplar (P. balsamifera) [7,19,57].
Common understory associates include: willows (Salix spp.), alders
(Alnus spp.), raspberries (Rubus spp.), currants (Ribes spp.), prickly
rose (Rosa acicularis), lignonberry (Vaccinium vitis-idaea), rusty
menziesia (Menziesia ferruginea), hazelnut (Corylus cornuta), bog
Labrador tea (Ledum groenlandicum), one sided wintergreen (Pyrola
secunda), dogwoods (Cornus canadensis and C. stolonifera), buffaloberry
(Shepherdia canadensis), devil's club (Oplopanax horridus), queencup
beadlily (Clintonia uniflora), oak fern (Gymnocarpium dryopteris),
twinflower (Linnaea borealis), twinberry honeysuckle (Lonicera
involucrata), fireweed (Epilobium angustifolium), bearberry
(Arctostaphylos uva-ursi), horsetails (Equisetum pratense, E. arvense,
and E. sylvanicum), bluejoint reedgrass (Calamagrostis canadensis), and
various feather mosses (Hylocomium and Pleurozium spp.), sedges (Carex spp.),
lichens (Cladonia and Cladina spp.) and sphagnum mosses.
Published classifications listing highbush cranberry as a dominant
understory species in plant associations (pas), community types (cts),
or vegetation types (vts) are as follows:
AREA CLASSIFICATION AUTHORITY
wc AB forest cts Corns 1983
int AK gen. veg. cts Dyrness and others 1989
int AK postfire forest cts Foote 1983
YT vts Stanek 1980
BC: Salmon River Valley vts Harcombe and others 1983
AK gen. veg. pas Viereck & Dyrness 1980
SPECIES: Viburnum edule
IMPORTANCE TO LIVESTOCK AND WILDLIFE :
Highbush cranberries are consumed by many small mammals and songbirds
[22,58]. Game birds including spruce grouse and ruffed grouse also eat
the berries [15,34]. Foliage is browsed by beaver, rabbit, and snowshoe
Highbush cranberry is of low to moderate importance as browse to
Roosevelt elk, Rocky Mountain elk, mountain goat, bighorn sheep,
black-tail deer, mule deer, white-tailed deer, and caribou [2,5]. The
foliage is also browsed by moose throughout the year [37,48].
Highbush cranberries are a major food of grizzly bears [3,23,40]. Black
bears consume highbush cranberries in late fall .
Viburnum foliage is low in palatability to livestock .
Pease  states that Viburnum foliage is highly unpalatable to snowshoe
hare, but others report it to be a preferred hare food in some areas .
NUTRITIONAL VALUE :
Highbush cranberry's current annual stem and leaf growth collected in
July from Kenai Peninsula, Alaska, were analyzed for browse quality to
moose. In-vitro dry matter digestibility was 52.8 percent and protein
content was 10.3 percent. Concentrations of the following elements
were found :
Ca K Mg Na
3,284 10,798 2,112 106
Cu Fe Mn Zn
21.0 5.0 24.4 23.5
COVER VALUE :
Viburnum species are important components of forest-edge and hedgerow
habitats that provide cover for small mammals and birds .
VALUE FOR REHABILITATION OF DISTURBED SITES :
The value of highbush cranberry for rehabilitative purposes has not been
well documented. It was studied for its use in oil sands reclamation,
but no results were detailed .
OTHER USES AND VALUES :
Highbush cranberries are edible and make excellent jams, jellies, and
sauces if picked before fully mature [29,32,58]. The berries were an
important food of Native Americans of the Bella Coola region of British
Columbia, where a single shrub may yield up to 100 berries . The
plant is cultivated for its brilliant red autumnal foliage .
OTHER MANAGEMENT CONSIDERATIONS :
Highbush cranberry is not considered to be a primary competitor to
conifers but is a component of major brush complexes that occur on
moist, productive sites on floodplains or under deciduous canopies. It
can compete significantly with natural or planted white spruce seedlings
in the Sub-Boreal Spruce and Boreal White and Black Spruce (Picea
mariana) Zones, where it is most abundant .
Highbush cranberry has shown varying responses to overstory removal.
Near Prince George, British Columbia, highbush cranberry in white
spruce-subalpine fir (Abies lasiocarpa) forests had not become a
significant component of the vegetation 6 years after clearcutting,
although it was present on all sites prior to the harvest . In
Alberta, highbush cranberry had significantly lower cover in 6- to
12-year-old clearcut areas than in adjacent mature lodgepole pine
stands. In contrast, logging of a balsam poplar stand in Alaska caused
a dramatic increase in highbush cranberry density. It was one of the
dominant shrubs and reached 3.3 feet (1 m) in height within 4 years
. In general, frequency and cover are expected to remain constant
or decrease slightly in the first few years after overstory removal.
Vigor may increase slowly on favorable sites .
Highbush cranberry is a seed-banking species, and soil disturbance
resulting from mechanical site preparation favors germination of stored
seed. The disturbance may also provide favorable seedbeds for freshly
deposited seed. Plants damaged in site preparation sprout from root
stocks and stem bases .
Highbush cranberry increased less in a winter-logged balsam poplar stand
than in one that had been summer-logged. Higher soil disturbance on the
summer-logged site may have stimulated sprouting. However,
scarification did not enhance cover of highbush cranberry in clearcut
areas near Edson, Alberta . Highbush cranberry was also less
abundant on mechanically prepared sites than on unscalped sites in
interior Alaska. Frequency and cover of highbush cranberry 3 years
after clearcutting and shelterwood cutting of white spruce stands were
as follows :
scalped unscalped scalped unscalped
Frequency (%) 13.3 38.3 13.3 20.0
Cover (%) 1.8 5.2 1.7 3.2
Highbush cranberry can be propagated vegetatively by hardwood or
softwood cuttings, although softwood cuttings are far more successful at
producing roots. Softwood cuttings root sooner and more prolifically in
sand than in perlite. Rooting success greatly increases by treating
cuttings with IBA (Indole-3-butyric acid). Rhizome cuttings also
successfully produce roots when planted immediately after fall
Seeding may also be used for propagation of Viburnums. Seeds may be
broadcast sown on prepared seedbeds and mulched with sawdust or sown
with drills and mulched with straw. Seedlings may require shading,
depending on location. Fertile, moist soils which are neutral to
slightly acidic result in best germination .
Herbicides can be used to control highbush cranberry. Glyphosate
exhibits good control and causes moderately severe damage to the plant
[2,22]. Aerially spraying a young aspen-balsam poplar stand in June
resulted in 95 percent defoliation and heavy mortality of highbush
cranberry . Roundup also causes defoliation and moderate mortality
rates . Hexazinone does not appear to control highbush cranberry
Highbush cranberry is utilized heavily in tent caterpillar outbreaks
. Aphids, thrips, spider mites, and scale are also likely to occur
on Viburnums. A leaf spot (Ascochyta viburni) has been found on plants
along coastal British Columbia, and a rust (Puccinia linkii) has been
found on plants in northern British Columbia. Neither of these diseases
is considered serious .
BOTANICAL AND ECOLOGICAL CHARACTERISTICS
SPECIES: Viburnum edule
GENERAL BOTANICAL CHARACTERISTICS :
Highbush cranberry is a straggling to erect deciduous shrub that reaches
heights ranging from 2 to 12 feet (0.6-3.5 m) [22,32,58]. It has
several to many stems that may grow to 1.5 inches (4 cm) in diameter
. The plant has smooth gray bark and sharply toothed leaves that
are shallowly lobed. Milky-white flowers are borne in few-flowered
terminal cymes. The fruit is an orange to red drupe that contains one
seed [1,32,58]. The berries often overwinter on twigs. Highbush
cranberry roots in the organic layer  and is rhizomatous .
RAUNKIAER LIFE FORM :
REGENERATION PROCESSES :
Sexual reproduction: Highbush cranberry begins to produce fruits at
approximately 5 years of age, and then produces large quantities nearly
every year thereafter. The one-seeded fruits are dispersed by the birds
and mammals that consume them [6,22]. Germination is normally delayed
until the second growing season after ripening. The seeds exhibit seed
coat and embryo dormancy that requires a two-stage stratification to be
broken. Most successful germination takes place when a warm period is
followed by cold stratification [21,22,59]. The radicle emerges and
begins growth during the warm period, and the cold period breaks the
dormancy of the plumule, which then grows when temperatures become
warmer. The time period of these stages is critical but has not been
worked out in detail. Clean, air-dried seeds can be stored up to 10
years without losing viability. Highbush cranberry is a seed-banking
Vegetative reproduction: Highbush cranberry can reproduce vegetatively
by natural layering and sprouting from damaged root stocks, stembases,
and stumps. The plant is rhizomatous, but there is no evidence of
lateral spread from the parent by rhizome or root suckers .
SITE CHARACTERISTICS :
Highbush cranberry is found in moist woods or forests, along stream or
lake margins on gravel or rocky banks, and on swamp or bog margins
[22,49,58]. In British Columbia, the plant is found from sea level to
about 4,900 feet (1,500 m) , but in Colorado elevational range is
7,000 to 9,000 feet (2,100-2,700 m) . The southern extent of
highbush cranberry's distribution is determined by high temperatures and
low humidity. Its presence at northern latitudes indicates a high
tolerance to frost and the ability to grow in low soil and air
temperatures. In moist climates, highbush cranberry grows on submesic
to subhydric soils, but in drier climates it is restricted to subhygric
and wetter moisture regimes. Highbush cranberry commonly grows under a
deciduous or coniferous canopy but probably develops best under full
Highbush cranberry grows best on well-drained, alluvial soils
[6,9,12,62]. Soil textures include clay, silty clay, sandy clay loam,
and fine loam [9,33,62]. Soil types include Luvisols, Brunisols,
Humo-Ferric Podzols, Regosols, and Gleysols .
SUCCESSIONAL STATUS :
Highbush cranberry is moderately shade tolerant  and is important
throughout all stages of forest succession [46,61]. In floodplain
succession, highbush cranberry is present from the pioneer willow
through seral balsam poplar stages. It remains important in mature and
climax white spruce and black spruce-white spruce types .
Highbush cranberry sprouts following fire and is an important component
of early, midseral, and climax postfire communities [13,61]. The
following frequencies and densities were found in white spruce stands in
Stage Years after fire Frequency(%) Density(stems/acre)
Newly burned 0-1 78 15,201 (37,562 st/ha)
Moss-herb 1-5 21 2,795 (6,906 st/ha)
Tall shrub-sapling 3-30 30 13,445 (33,222 st/ha)
Dense tree 26-45 36 3,713 (9,175 st/ha)
Hardwood 46-150 55 15,378 (38,000 st/ha)
Spruce 150-300+ 39 2,049 (5,062 st/ha)
Low successive peaks between the newly burned, tall shrub-sapling, and
hardwood stages may have been caused by stand differences or successful
establishment followed by opportunism .
SEASONAL DEVELOPMENT :
Highbush cranberry flowers from May to August, depending on location.
Fruits ripen from August to October and persist throughout the winter
[18,22,58]. Leaf flush begins in April or May, and senescence and
abscission take place earlier than on associated shrubs .
SPECIES: Viburnum edule
FIRE ECOLOGY OR ADAPTATIONS :
Highbush cranberry sprouts from the stump, roots, or underground stems
following fire [13,61]. Sprouting may also occur at the base of
fire-killed aboveground stems [22,24]. Highbush cranberry roots are
buried approximately 8 inches (20 cm) below the soil surface, allowing
them to survive light fires that do not entirely remove the organic
layer . Rhizomes will also survive fires of this nature. Highbush
cranberry seeds are hard and have thick seed coats, making them somewhat
resistant to fire . Regeneration by seeds stored in the soil may
actually be favored by low-severity fires .
FIRE REGIMES :
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 :
survivor species; on-site surviving root crown or caudex
survivor species; on-site surviving rhizomes
ground-stored residual colonizer; fire-activated seed on-site in soil
off-site colonizer; seed carried by animals or water; postfire yr 1&2
secondary colonizer; off-site seed carried to site after year 2
SPECIES: Viburnum edule
IMMEDIATE FIRE EFFECT ON PLANT :
Fire top-kills highbush cranberry. Moderate- to high-severity fires
which remove soil organic layers may kill roots, underground stems, and
DISCUSSION AND QUALIFICATION OF FIRE EFFECT :
PLANT RESPONSE TO FIRE :
Highbush cranberry sprouts within weeks following fire [19,22] and often
becomes one of the dominant postfire shrubs . Low-severity fires
stimulate germination of seeds stored in the soil [24,47]. Abundance of
the plant may be initially reduced after fire, but an increase over
prefire density may take place within the next 10 years [6,28].
DISCUSSION AND QUALIFICATION OF PLANT RESPONSE :
The Research Project Summary Understory recovery after burning and reburning
quaking aspen stands in central Alberta provides information on prescribed
fire and postfire response of plant community species including highbush
FIRE MANAGEMENT CONSIDERATIONS :
Prescribed fires of low-severity and short duration are recommended for
the management of highbush cranberry. Fires of this type favor the
germination of buried seeds and sprouting of vegetative structures
SPECIES: Viburnum edule
1. Anderson, J. P. 1959. Flora of Alaska and adjacent parts of Canada.
Ames, IA: Iowa State University Press. 543 p. 
2. Balfour, Patty M. 1989. Effects of forest herbicides on some important
wildlife forage species. Victoria, BC: British Columbia Ministry of
Forests, Research Branch. 58 p. 
3. Banner, Allen; Pojar, Jim; Trowbridge, Rick; Hamilton, Anthony. 1986.
Grizzly bear habitat in the Kimsquit River Valley, coastal British
Columbia: classification, description, and mapping. In: Contreras, Glen
P.; Evans, Keith E., compilers. Proceedings--grizzly bear habitat
symposium; 1985 April 30 - May 2; Missoula, MT. Gen. Tech. Rep. INT-207.
Ogden, UT: U.S. Department of Agriculture, Forest Service, Intermountain
Research Station: 36-49. 
4. Bernard, Stephen R.; Brown, Kenneth F. 1977. Distribution of mammals,
reptiles, and amphibians by BLM physiographic regions and A.W. Kuchler's
associations for the eleven western states. Tech. Note 301. Denver, CO:
U.S. Department of the Interior, Bureau of Land Management. 169 p.
5. Blower, Dan. 1982. Key winter forage plants for B.C. ungulates.
Victoria, BC: British Columbia Ministry of the Environment, Terrestrial
Studies Branch. 
6. Coates, D.; Haeussler, S. 1986. A preliminary guide to the response of
major species of competing vegetation to silvicultural treatments.
Victoria, BC: Ministry of Forests, Information Services Branch; Land
Management Handbook Number 9. 88 p. 
7. Corns, Ian G. W. 1989. Ecosystems with potential for aspen management.
Managing for aspen--a shared responsibility: Proceedings of the Joint
Technical Session of the Forest Ecology, Silviculture and Tree
Improvement Forest Management, and Forest Economics and Policy Working
Groups; September 1988; Prince Albert, SK. In: The Forestry Chronicle.
February: 16-22. 
8. Dibble, Alison C.; Campbell, Christopher S.; Tyler, Harry R., Jr.;
Vickery, Barbara St. J. 1989. Maine's official list of endangered and
threatened plants. Rhodora. 91(867): 244-269. 
9. Dirschl, H. J.; Coupland, R. T. 1972. Vegetation patterns and site
relationships in the Saskatchewan River Delta. Canadian Journal of
Botany. 50: 647-675. 
10. Dorn, Robert D. 1984. Vascular plants of Montana. Cheyenne, WY: Mountain
West Publishing. 276 p. 
11. Dorn, Robert D. 1988. Vascular plants of Wyoming. Cheyenne, WY: Mountain
West Publishing. 340 p. 
12. Dyrness, C. T. Van Cleve, K.; Levison, J. D. 1989. The effect of
wildfire on soil chemistry in four forest types in interior Alaska.
Canadian Journal of Forest Research. 19: 1389-1396. 
13. Dyrness, C. T.; Viereck, L. A.; Van Cleve, K. 1986. Fire in taiga
communities of interior Alaska. In: Forest ecosystems in the Alaskan
taiga. New York: Springer-Verlag: 74-86. 
14. Eis, S. 1981. Effect of vegetative competition on regeneration of white
spruce. Canadian Journal of Forest Research. 11: 1-8. 
15. Ellison, Laurence. 1966. Seasonal foods and chemical analysis of winter
diet of Alaskan spruce grouse. Journal of Wildlife Management. 30(4):
16. Eyre, F. H., ed. 1980. Forest cover types of the United States and
Canada. Washington, DC: Society of American Foresters. 148 p. 
17. Fedkenheruer, A. W. 1979. Native shrub research for oil sands
reclamation. Edmonton, AB: Syncrude Canada Ltd. 14 p. 
18. Fernald, Merritt Lyndon. 1950. Gray's manual of botany. [Corrections
supplied by R. C. Rollins]. Portland, OR: Dioscorides Press. 1632 p.
(Dudley, Theodore R., gen. ed.; Biosystematics, Floristic & Phylogeny
Series; vol. 2). 
19. Foote, M. Joan. 1983. Classification, description, and dynamics of plant
communities after fire in the taiga of interior Alaska. Res. Pap.
PNW-307. Portland, OR: U.S. Department of Agriculture, Forest Service,
Pacific Northwest Forest and Range Experiment Station. 108 p. 
20. 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. 
21. Gill, John D.; Healy, William M. 1974. Shrubs and vines for Northeastern
wildlife. Gen. Tech. Rep. NE-9. Upper Darby, PA: U.S. Department of
Agriculture, Forest Service, Northeastern Forest Experiment Station. 180
22. Haeussler, S.; Coates, D. 1986. Autecological characteristics of
selected species that compete with conifers in British Columbia: a
literature review. Land Management Report No. 33. Victoria, BC: Ministry
of Forests, Information Services Branch. 180 p. 
23. Hamilton, Anthony; Archibald, W. Ralph. 1986. Grizzly bear habitat in
the Kimsquit River Valley, coastal British Columbia: evaluation. In:
Contreras, Glen P.; Evans, Keith E., compilers. Proceedings-grizzly bear
habitat symposium; 1985 April 30 - May 2; Missoula, MT. Gen. Tech. Rep.
INT-207. Ogden, UT: U.S. Department of Agriculture, Forest Service,
Intermountain Research Station: 50-56. 
24. Hamilton, Evelyn H.; Yearsley, H. Karen. 1988. Vegetation development
after clearcutting and site preparation in the SBS zone. Economic and
Regional Development Agreement: FRDA Report 018. Victoria, BC: Canadian
Forestry Service, Pacific Forestry Centre; British Columbia Ministry of
Forests and Lands. 66 p. 
25. Harcombe, Andrew; Pendergast, Bruce; Petch, Bruce; Janz, Doug. 1983. Elk
habitat management: Salmon River Valley. MOE Working Report 1. 83-05-10.
Victoria, BC: Ministry of the Environment. 83 p. 
26. Harrington, H. D. 1964. Manual of the plants of Colorado. 2d ed.
Chicago: The Swallow Press Inc. 666 p. 
27. Hatler, David F. 1972. Food habits of black bears in interior Alaska.
Canadian Field-Naturalist. 86(1): 17-31. 
28. Hawkes, B. C.; Feller, M. C.; Meehan, D. 1990. Site preparation: fire.
In: Lavender, D. P.; Parish, R.; Johnson, C. M.; [and others], eds.
Regenerating British Columbia's forests. Vancouver, BC: University of
British Columbia Press: 131-149. 
29. Holloway, Patricia S.; Alexander, Ginny. 1990. Ethnobotany of the Fort
Yukon region, Alaska. Economic Botany. 44(2): 214-225. 
30. Holloway, Patricia; Zasada, John. 1979. Vegetative propagation of 11
common Alaska woody plants. Res. Note PNW-334. Portland, OR: U.S.
Department of Agriculture, Forest Service, Pacific Northwest Forest and
Range Experiment Station. 12 p. 
31. Houtcooper, Wayne C.; Ode, David J.; Pearson, John A.; Vandel, George
M., III. 1985. Rare animals and plants of South Dakota. Prairie
Naturalist. 17(3): 143-165. 
32. Hulten, Eric. 1968. Flora of Alaska and neighboring territories.
Stanford, CA: Stanford University Press. 1008 p. 
33. Jones, R. Keith; Pierpoint, Geoffrey; Wickware, Gregory M.; [and
others]. 1983. Field guide to forest ecosystem classification for the
Clay Belt, site region 3e. Maple, Ontario: Ministry of Natural
Resources, Ontario Forest Research Institute. 160 p. 
34. Kelleyhouse, David G. 1979. Fire/wildlife relationships in Alaska. In:
Hoefs, M.; Russell, D., eds. Wildlife and wildfire: Proceedings of
workshop; 1979 November 27-28; Whitehorse, YT. Whitehorse, YT: Yukon
Wildlife Branch: 1-36. 
35. 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. 
36. 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. 
37. LeResche, Robert E.; Davis, James L. 1973. Importance of nonbrowse foods
to moose on the Kenai Peninsula, Alaska. Journal of Wildlife Management.
37(3): 279-287. 
38. Lepofsky, Dana; Turner, Nancy J.; Kuhnlein, Harriet V. 1985. Determining
the availability of traditional wild plant foods: an example of Nuxalk
foods, Bella Coola, British Columbia. Ecology of Food and Nutrition. 16:
39. 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. 
40. Meehan, William R. 1974. The forest ecosystem of southeast Alaska: 4.
Wildlife habitats. Gen. Tech. Rep. PNW-16. Portland, OR: U.S. Department
of Agriculture, Forest Service, Pacific Northwest Forest and Range
Experiment Station. 32 p. 
41. Oldemeyer, J. L.; Franzmann, A. W.; Brundage, A. L.; [and others]. 1977.
Browse quality and the Kenai moose population. Journal of Wildlife
Management. 41(3): 533-542. 
42. Pease, James L.; Vowles, Richard H.; Keith, Lloyd B. 1979. Interaction
of snowshoe hares and woody vegetation. Journal of Wildlife Management.
43(1): 43-60. 
43. Potter, Loren D.; Moir, D. Ross. 1961. Phytosociological study of burned
deciduous woods, Turtle Mountains North Dakota. Ecology. 42(3): 468-480.
44. Raunkiaer, C. 1934. The life forms of plants and statistical plant
geography. Oxford: Clarendon Press. 632 p. 
45. Roland, A. E.; Smith, E. C. 1969. The flora of Nova Scotia. Halifax, NS:
Nova Scotia Museum. 746 p. 
46. Rowe, J. S. 1956. Uses of undergrowth plant species in forestry.
Ecology. 37(3): 461-473. 
47. Rowe, J. S. 1983. Concepts of fire effects on plant individuals and
species. In: Wein, Ross W.; MacLean, David A., eds. SCOPE 18: The role
of fire in northern circumpolar ecosystems. Chichester; New York: John
Wiley & Sons: 135-154. 
48. Snyder, J. D.; Janke, R. A. 1976. Impact of moose browsing on
boreal-type forests of Isle Royale National Park. American Midland
Naturalist. 95(1): 79-92. 
49. Soper, James H.; Heimburger, Margaret L. 1982. Shrubs of Ontario. Life
Sciences Misc. Publ. Toronto, ON: Royal Ontario Museum. 495 p. 
50. Stanek, Walter. 1980. Vegetation types and environmental factors
associated with Foothills Gas pipeline route, Yukon Territory. BC-X-205.
Victoria, BC: Environment Canada, Canadian Forestry Service, Pacific
Forest Research Centre. 48 p. 
51. Strong, W. L.; LaRoi, G. H. 1986. A strategy for concurrently monitoring
the plant water potentials of spatially separate forest ecosystems.
Canadian Journal of Forest Research. 16(2): 346-351. 
52. Strong, W. L.; Pluth, D. J.; La Roi, G. H.; Corns, I. G. W. 1991.
Continuation of #17695 - Keywords. Canadian Journal of Forest Research.
21: 1675-1683. 
53. Thilenius, John F. 1971. Vascular plants of the Black Hills of South
Dakota and Wyoming. Res. Pap. RM-71. Fort Collins, CO: U.S. Department
of Agriculture, Forest Service, Rocky Mountain Forest and Range
Experiment Station. 43 p. 
54. U.S. Department of Agriculture, Soil Conservation Service. 1982.
National list of scientific plant names. Vol. 1. List of plant names.
SCS-TP-159. Washington, DC. 416 p. 
55. 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. 
56. Viereck, Leslie A. 1970. Forest succession and soil development adjacent
to the Chena River in interior Alaska. Arctic and Alpine Research. 2(1):
57. Viereck, L. A.; Dyrness, C. T.; Batten, A. R.; Wenzlick, K. J. 1992. The
Alaska vegetation classification. Gen. Tech. Rep. PNW-GTR-286. Portland,
OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest
Research Station. 278 p. 
58. 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. 
59. Viereck, Leslie A.; Schandelmeier, Linda A. 1980. Effects of fire in
Alaska and adjacent Canada--a literature review. BLM-Alaska Tech. Rep.
6. Anchorage, AK: U.S. Department of the Interior, Bureau of Land
Mangement, Alaska State Office. 124 p. 
60. Wolff, Jerry O. 1978. Food habits of snowshoe hare in interior Alaska.
Journal of Wildlife Management. 42(1): 148-153. 
61. Yarie, J.; Viereck, L.; Van Cleve, K.; Dryness, C. T. 1988. The
chronosequence as an aid to understanding the long-term consequences
of management activities. In: Dyck, W. J.; Mees, C. A, eds. Research
Strategies for Long-term Productivity. Proceedings, IEA/BE A3 Workshop;
[Date of conference unknown]; Seattle, WA. IEA/BE A3 Report No. 8.
Rotorua, New Zeland, --: Forest Research Institute: 25-38. 
62. Yole, D.; Lewis, T.; Inselberg, A.; [and others]. 1989. A field guide
for identification and interpretation of the Engelmann spruce-subalpine
fir zone in the Prince Rupert Forest Region, BC. Victoria, BC: Ministry
of Forests, Research Branch. 81 p. 
63. Zasada, John C.; Grigal, David F. 1978. The effects of silvicultural
system and seed bed preparation on natural regeneration of white spruce
and associated species in Interior Alaska. In: Hollis, Charles A.;
Squillace, Anthony E., eds. Proceedings: Fifth North American Forest
Biology Workshop; [Date of conference unknown]; [Location of conference
unknown]. [Place of publication unknown]. Forest Service, U.S.
Department of Agriculture: 213-220.