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Wildlife, Animals, and Plants
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Introductory
SPECIES: Rubus discolor | Himalayan Blackberry
ABBREVIATION :
RUBDIS
SYNONYMS :
Rubus procerus
Rubus macrostemon
Rubus fruticosus
Rubus thyrsanthus
SCS PLANT CODE :
RUDI2
COMMON NAMES :
Himalayan blackberry
TAXONOMY :
The currently accepted scientific name of the Himalayan blackberry is
Rubus discolor Weihe and Nees [17]. Infrataxa have not been described
for this species.
Himalayan blackberry hybridizes with a number of Rubus species including
R. thyrsiger, R. calvatus, and R. schlechtendalii [6].
LIFE FORM :
Shrub
FEDERAL LEGAL STATUS :
No special status
OTHER STATUS :
NO-ENTRY
COMPILED BY AND DATE :
D. Tirmenstein, October 1989.
LAST REVISED BY AND DATE :
NO-ENTRY
AUTHORSHIP AND CITATION :
Tirmenstein, D. 1989. Rubus discolor. In: Remainder of Citation
DISTRIBUTION AND OCCURRENCE
SPECIES: Rubus discolor | Himalayan Blackberry
GENERAL DISTRIBUTION :
The Himalayan blackberry is a native of the Old World [3,31]. However,
it has become widely naturalized in the Northeast from Delaware to
Virginia, and in the Pacific Northwest [3]. The Himalayan blackberry
occurs from northern California through southern British Columbia
eastward to Idaho. It is particularly widespread west of the Cascades
[14] and is now abundant along the Snake River in southeastern
Washington [13]. It is also locally established in parts of Utah and
perhaps Arizona [19,31].
ECOSYSTEMS :
FRES10 White - red - jack pine
FRES13 Loblolly - shortleaf pine
FRES15 Oak - hickory
FRES18 Maple - beech - birch
FRES24 Hemlock - Sitka spruce
FRES28 Western hardwoods
STATES :
CA DE ID MD OR UT VA WA BC
ADMINISTRATIVE UNITS :
EBLA NOCA OLYM REDW SAJU
BLM PHYSIOGRAPHIC REGIONS :
1 Northern Pacific Border
2 Cascade Mountains
3 Southern Pacific Border
4 Sierra Mountains
5 Columbia Plateau
6 Upper Basin and Range
8 Northern Rocky Mountains
9 Middle Rocky Mountains
12 Colorado Plateau
KUCHLER PLANT ASSOCIATIONS :
K001 Spruce - cedar - hemlock forest
K002 Cedar - hemlock - Douglas-fir forest
K102 Beech - maple forest
K106 Northern hardwoods
K111 Oak - hickory - pine forest
SAF COVER TYPES :
21 Eastern white pine
60 Beech - sugar maple
64 Sassafras - persimmon
78 Virginia pine - oak
79 Virginia pine
80 Loblolly pine - shortleaf pine
81 Loblolly pine
82 Loblolly pine - hardwood
109 Hawthorn
222 Black cottonwood - willow
224 Western hemlock
226 Coastal true fir - hemlock
227 Western redcedar - western hemlock
230 Douglas-fir - western hemlock
SRM (RANGELAND) COVER TYPES :
NO-ENTRY
HABITAT TYPES AND PLANT COMMUNITIES :
Associated species: A wide variety of weedy species occur with
Himalayan blackberry on disturbed sites in the Northeast and Pacific
Northwest. The following species commonly grow with Himalayan blackberry
in riparian zones of California: trailing blackberry (Rubus ursinus),
evergreen blackberry (R. laciniatus), Fremont cottonwood (Populus
fremontii), black cottonwood (P. trichocarpa), oaks (Quercus spp.),
arroyo willow (Salix lasiolepis), and other willows (Salix spp.)
[18,22,28,32].
VALUE AND USE
SPECIES: Rubus discolor | Himalayan Blackberry
WOOD PRODUCTS VALUE :
NO-ENTRY
IMPORTANCE TO LIVESTOCK AND WILDLIFE :
Wildlife: The Himalayan blackberry provides food and cover for many
wildlife species. Fruits of blackberries are eaten by numerous birds,
including the northern bobwhite, scaled quail, ruffed grouse,
sharp-tailed grouse, California quail, ring-necked pheasant, blue
grouse, gray (Hungarian) partridge, band-tailed pigeon, gray catbird,
northern cardinal, American robin, yellow-breasted chat, pine grosbeak,
summer tanager, orchard oriole, brown thrasher, thrushes, and towhees
[1,30,33]. Mammals such, as the coyote, common opossum, red squirrel,
raccoon, gray fox, red fox, skunks, squirrels, chipmunks, and black
bear, also feed on blackberries [30,33].
Deer, rabbits, and mountain beaver consume the buds, stems, and leaves
of blackberries [30,33]. The Himalayan blackberry is considered a
primary elk browse in parts of California, where it is used primarily
during the winter months [12]. Porcupines and beaver feed on the
cambium, buds, and stems of many species of blackberries [30].
Livestock: Blackberries, in general, provide only poor browse for
domestic livestock [30]. However, the specific value of Himalayan
blackberry has not been documented. In some areas, this shrub may
represent a barrier to the movement of livestock. Domestic sheep
occasionally become entangled in the spiny foliage of this sprawling
shrub [13].
PALATABILITY :
Fruits of blackberries are highly palatable to many birds and mammals.
Palatability of Himalayan blackberry browse has not been determined.
NUTRITIONAL VALUE :
NO-ENTRY
COVER VALUE :
Dense blackberry thickets form suitable nesting sites for many species
of birds [33]. Mammals, such as rabbits, red squirrel, black bear, and
beaver, use blackberry thickets as hiding or resting sites [30].
VALUE FOR REHABILITATION OF DISTURBED SITES :
Most blackberries are valuable for preventing soil erosion on barren,
infertile, disturbed sites [3,30]. The Himalayan blackberry has been
successfully planted in riparian areas along Columbia River impoundments
in north-central Washington [5]. Good survival was observed up to 5
years after the initial plantings were made [5].
Blackberries may be propagated vegetatively, transplanted, or seeded
onto disturbed sites. According to Brinkman [3], seed which has been
scarified can be successfully planted in the late summer or early fall.
Seed planted in the fall does not require cold treatment. Previously
stratified and scarified seed can be planted in the spring. Good
results have been obtained after seeds were planted with a drill and
covered with 1/8 to 3/16 inch (0.3-0.5 cm) of soil [3].
OTHER USES AND VALUES :
Himalayan blackberry is the most commonly harvested wild blackberry in
western Washington and Oregon, although its fruit is reportedly less
flavorful than that of the native trailing blackberry (Rubus ursinus)
[7]. It is a preferred berry for fruit pies [7]. The fruit, roots, and
stems of blackberries have been used to make various medicinal
preparations [3]. Many blackberries are grown in gardens or as
ornamentals. Himalayan blackberry was first cultivated in 1890 [3].
MANAGEMENT CONSIDERATIONS :
Competition: The introduced Himalayan blackberry has spread
aggressively in many parts of the United States. It is now regarded as
a serious pest in parts of the Pacific Northwest, particularly west of
the Cascades [14].
Chemical control: Good to excellent control of the Himalayan blackberry
can be obtained through the use of glyphosate, picloram + 2,4-D,
triclopyr ester, or triclopyr amine [4].
BOTANICAL AND ECOLOGICAL CHARACTERISTICS
SPECIES: Rubus discolor | Himalayan Blackberry
GENERAL BOTANICAL CHARACTERISTICS :
The Himalayan blackberry is a robust, clambering or sprawling, evergreen
shrub which grows up to 9.8 feet (3 m) in height [25,31]. Leaves are
pinnately to palmately compound, with three to five broad leaflets
[25,31]. Mature leaves are green and glaucous above but tomentose
beneath [31].
Stems of most blackberries are biennial. Sterile first-year stems, or
primocanes, develop from buds at or below the ground surface and bear
only leaves [11]. During the second year, lateral branches, known as
floricanes, develop in the axils of the primocanes, and produce both
leaves and flowers [11].
Perfect flowers are borne in clusters of 3 to 20 [24,31]. Flowers are
most commonly white, but rose or reddish flowers also occur [24,31].
Ripe fruit, commonly referred to as "berries," are soft, shiny black and
composed of an aggregate of large succulent drupelets [3,25].
RAUNKIAER LIFE FORM :
Hemicryptophyte
REGENERATION PROCESSES :
The Himalayan blackberry is capable of extensive and vigorous vegetative
regeneration [32]. Sexual reproduction may also be important.
Reproductive versatility is well represented in the Rubus genus, with
sexual reproduction, parthenogenesis (development of the egg without
fertilization), pseudogamy (a form of apomixis in which pollination is
required), and parthenocarpy (production of fruit without
fertilization), occurring widely [6]. The following types of
reproduction have been documented in blackberries: (1) sexual
reproduction, (2) nonreduction at meiosis on the female, male, or both
sides, (3) apomixis (seeds contain embryos of maternal, rather than
sexual origin) with segregation, (4) apomixis without segregation, and
(5) haploid parthenogenesis [6]. These modes of asexual reproduction
contribute significantly to the aggressive, vigorous spread of
blackberries.
Vegetative regeneration: The mostly biennial stems of blackberries
typically develop from perennial rootstocks or creeping stems [11].
Most species within the Rubus genus are capable of sprouting vigorously
from root or stem suckers, or rooting stem tips [11]. Although not
specifically documented for the Himalayan blackberry, a similar response
is probable given the plant's morphology and the speed at which
postdisturbance establishment and spread occurs. The Himalayan
blackberry is known to spread extensively by trailing stems which root
at the nodes [32]. Rapid vegetative spread occurs even in the absence
of disturbance.
Seed production: Most blackberries produce good seed crops nearly every
year [3]. Immature fruit of the Himalayan blackberry is red and hard,
but at maturity, fruit becomes shiny black, soft, and succulent [3].
Individual drupelets form an aggregate up to 0.8 inches (2 cm) in length
[3,24]. Cleaned seed averages approximately 147,000 per pound
(323,789/kg) [3].
Germination: Blackberry seeds have a hard impermeable coat and a
dormant embryo [3]. Consequently, germination is often slow. Most
blackberries require, as a minimum, warm stratification at 68 to 86
degrees F (20 to 30 degrees C) for 90 days, followed by cold
stratification at 36 to 41 degrees F (2 to 5 degrees C) for an
additional 90 days [3]. These conditions are frequently encountered
naturally as seeds mature in summer and remain in the soil throughout
the cold winter months. Laboratory tests indicate that exposure to
sulfuric acid solutions or sodium hyperchlorite prior to cold
stratification can enhance germination [3].
Seedbanking: Seeds of most blackberries can remain viable when stored
in the soil for a period of at least several years [2]. However, the
specific length of viability has not been documented for the Himalayan
blackberry.
Seed dispersal: Seeds of blackberries are readily dispersed by gravity
and by many species of birds and mammals. The large succulent fruits
are highly sought-after and, after they mature, rarely remain on the
plant for long [3]. A hard seedcoat protects the embryo even when the
seeds are ingested. Evidence suggests that the action of avian gizzards
and exposure to mammalian digestive acids provide scarification which
may actually enhance germination [1].
SITE CHARACTERISTICS :
The Himalayan blackberry typically grows in open weedy sites, such as
along field margins, railroad right-of-ways, roadsides, and on abandoned
farms [6,14,31]. It is also common in riparian woodlands and intertidal
zones of central California [18,22,28,32].
Soils: Blackberries grow well on a variety of barren, infertile soil
types [3]. These shrubs tolerate a wide range of soil pH and texture,
but do require adequate soil moisture [33]. The Himalayan blackberry
appears to be tolerant of periodic flooding by brackish or fresh water
[32].
Elevation: Elevational ranges of the Himalayan blackberry have been
documented as follows for two western states [19,31]:
> 6,000 feet (1,829 m) in AZ
from 2,788 to 5,000 feet (850-1,525 m) in UT
SUCCESSIONAL STATUS :
Blackberries are generally most prevalent in early seral communities.
In the Northeast, blackberries are aggressive invaders in old field
communities [33]. In the West, the introduced Himalayan blackberry
commonly occurs as an early seral species in relatively open disturbed
areas, such as along roadways or on abandoned homesteads [31]. This
blackberry also grows in certain riparian areas of California where it
can apparently establish and persist despite periodic inundation by
fresh or brackish water [32]. This periodic flooding can produce
relatively long-lived early seral communities conducive to the growth
and spread of blackberries. The Himalayan blackberry is one of the few
woody plants pioneering certain intertidal zones of the lower Sacramento
River [32]. Little is known about the successional status of the
Himalayan blackberry in its native Europe.
SEASONAL DEVELOPMENT :
The Himalayan blackberry generally flowers from June to August [3,13].
Fruit ripens in August and September [3], with seed dispersal in the
fall.
FIRE ECOLOGY
SPECIES: Rubus discolor | Himalayan Blackberry
FIRE ECOLOGY OR ADAPTATIONS :
Blackberries are typically observed in greatest abundance following fire
or other types of disturbance. The Himalayan blackberry is well adapted
to invade recently burned sites. Most blackberries sprout vigorously
after fire [9]. Various regenerative structures located at or below the
ground surface enable this shrub to sprout, even when aboveground
foliage is totally consumed by fire. Sprouting through rooting stem
nodes [32] is also likely if even portions of the aboveground stem
remain undamaged.
Most blackberries store seed in seedbanks. Plants can readily reoccupy
recently burned sites through seed protected from the direct effects of
fire by overlying soil or duff. Seed generally remains viable for long
periods of time [2] and germinates in abundance after disturbance. The
relatively large, sweet, succulent fruits of blackberries amply reward
animal dispersers [16], and some postfire reestablishment through seed
transported from off-site is also probable.
POSTFIRE REGENERATION STRATEGY :
Tall shrub, adventitious-bud root crown
Rhizomatous shrub, rhizome in soil
Geophyte, growing points deep in soil
Initial-offsite colonizer (off-site, initial community)
Ground residual colonizer (on-site, initial community)
FIRE EFFECTS
SPECIES: Rubus discolor | Himalayan Blackberry
IMMEDIATE FIRE EFFECT ON PLANT :
Although Himalayan blackberry plants may be top-killed, actual mortality
appears to be uncommon because of the prolific sprouting ability of this
shrub.
Most Himalayan blackberry seed stored on-site in the soil or duff is
probably unharmed by fire.
DISCUSSION AND QUALIFICATION OF FIRE EFFECT :
NO-ENTRY
PLANT RESPONSE TO FIRE :
Vegetative response: The Himalayan blackberry is capable of rapid,
extensive spread through trailing aboveground stems which root at the
nodes [32]. Plants are presumably able to regenerate vegetatively and
resume growth when portions of the aboveground stems remain undamaged.
Most blackberries readily regenerate vegetatively from underground
structures such as roots, rhizomes, or rootstocks when aboveground
foliage is removed [11]. Regeneration through various underground
structures, which are well protected from the direct effects of fire by
overlying soil, is probable even when the aboveground vegetation is
totally consumed by fire.
Seedling establishment: Exposed mineral soil can provide a favorable
seedbed, and extensive postfire establishment of on-site seed is
commonly observed in many blackberries. Birds and mammals may also
transport some viable seed to the site.
Rate of postfire recovery: The weedy Himalayan blackberry is described
as a "serious pest" which is well represented on many types of disturbed
sites [7,14]. Its role as a vigorous invader on waste ground suggests
the potential for rapid postfire recovery in many areas.
DISCUSSION AND QUALIFICATION OF PLANT RESPONSE :
NO-ENTRY
FIRE MANAGEMENT CONSIDERATIONS :
Wildlife species which consume large amounts of blackberries are often
benefited by fire [20].
REFERENCES
SPECIES: Rubus discolor | Himalayan Blackberry
REFERENCES :
1. Barber, William Hollis, Jr. 1976. An autecological study of salmonberry
(Rubus spectabilis, Pursh) in western Washington. Seattle, WA:
University of Washington. 154 p. Thesis. [7189]
2. 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.
[434]
3. Brinkman, Kenneth A. 1974. Rubus L. blackberry, raspberry. In:
Schopmeyer, C. S., ed. Seeds of woody plants in the United States.
Agriculture Handbook No. 450. Washington, DC: U.S. Department of
Agriculture, Forest Service: 738-743. [7743]
4. Burrill, Larry C.; Braunworth, William S., Jr.; William, Ray D.; [and
others], compilers. 1989. Pacific Northwest weed control handbook.
Corvallis, OR: Oregon State University, Extension Service, Agricultural
Communications. 276 p. [6235]
5. Carson, Robert G.; Edgerton, Paul J. 1989. Creating riparian wildlife
habitat along a Columbia River impoundment in northcentral Washington.
In: Wallace, Arthur; McArthur, E. Durant; Haferkamp, Marshall R.,
compilers. Proceedings--symposium on shrub ecophysiology and
biotechnology; 1987 June 30 - July 2; Logan, UT. Gen. Tech. Rep.
INT-256. Ogden, UT: U.S. Department of Agriculture, Forest Service,
Intermountain Research Station: 64-69. [5924]
6. Crane, M. B. 1940. Reproductive versatility in Rubus. I. Morphology and
inheritance. Journal of Genetics. 40: 109-118. [8443]
7. Dale, Nancy. 1986. Flowering plants: The Santa Monica Mountains, coastal
and chaparral regions of southern California. Santa Barbara, CA: Capra
Press. In coooperation with: The California Native Plant Society. 239 p.
[7605]
8. Eyre, F. H., ed. 1980. Forest cover types of the United States and
Canada. Washington, DC: Society of American Foresters. 148 p. [905]
9. Ferguson, Robert B. 1983. Use of rosaceous shrubs for wildland plantings
in the Intermountain West. In: Monsen, Stephen B.; Shaw, Nancy,
compilers. Managing Intermountain rangelands--improvement of range and
wildlife habitats; Proceedings of symposia; 1981 September 15-17; Twin
Falls, ID; 1982 June 22-24; Elko, NV. Gen. Tech. Rep. INT-157. Ogden,
UT: U.S. Department of Agriculture, Forest Service, Intermountain Forest
and Range Experiment Station: 136-149. [915]
10. 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. [998]
11. Great Plains Flora Association. 1986. Flora of the Great Plains.
Lawrence, KS: University Press of Kansas. 1392 p. [1603]
12. Harper, James A. 1962. Daytime feeding habits of Roosevelt elk on Boyes
Prairie, California. Journal of Wildlife Management. 26(1): 97-100.
[8876]
13. Hitchcock, C. Leo; Cronquist, Arthur. 1961. Vascular plants of the
Pacific Northwest. Part 3: Saxifragaceae to Ericaceae. Seattle, WA:
University of Washington Press. 614 p. [1167]
14. Hitchcock, C. Leo; Cronquist, Arthur. 1973. Flora of the Pacific
Northwest. Seattle, WA: University of Washington Press. 730 p. [1168]
15. Hogdon, A. R.; Steele, Frederic. 1966. Rubus subgenus Eubatus in New
England: a conspectus. Rhodora. 68: 474-513. [6213]
16. Janzen, Daniel H. 1984. Dispersal of small seeds by big herbivores:
foliage is the fruit. American Naturalist. 123(3): 338-353. [6901]
17. 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. [6954]
18. Katibah, Edwin F.; Nedeff, Nicole E.; Dummer, Kevin J. 1984. Summary of
riparian vegetation aerial and linear extent measurements from the
Central Valley Riparian Mapping Project. In: Warner, Richard E.;
Hendrix, Kathleen M., eds. California riparian systems: Ecology,
conservation, and productive management: Proceedings of the conference;
1981 September 17-19; Davis, CA. Berkeley, CA: University of California
Press: 46-50. [5824]
19. Kearney, Thomas H.; Peebles, Robert H.; Howell, John Thomas; McClintock,
Elizabeth. 1960. Arizona flora. 2d ed. Berkeley, CA: University of
California Press. 1085 p. [6563]
20. Kramp, Betty A.; Patton, David R.; Brady, Ward W. 1983. The effects of
fire on wildlife habitat and species. RUN WILD: Wildlife/ habitat
relationships. Albuerque, NM: U.S. Department of Agriculture, Forest
Service, Southwestern Region, Wildlife Unit Technical Report. 29 p.
[152]
21. 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. [1384]
22. Laymon, Stephen A. 1984. Photodocumentation of vegetation and landform
change on a riparian site, 1880-1980: Dog Island, Red Bluff, California.
In: Warner, Richard E.; Hendrix, Kathleen M., eds. California riparian
systems: Ecology, conservation, and productive management: Proceedings
of a conference; 1981 September 17-19; Davis, CA. Berkeley, CA:
University of California Press: 150-159. [5833]
23. 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. [1496]
24. Munz, Philip A. 1973. A California flora and supplement. Berkeley, CA:
University of California Press. 1905 p. [6155]
25. Munz, Philip A. 1974. A flora of southern California. Berkeley, CA:
University of California Press. 1086 p. [4924]
26. Neiland, Bonita J. 1958. Forest and adjacent burn in the Tillamook Burn
area of northwestern Oregon. Ecology. 39(4): 660-671. [8879]
27. Raunkiaer, C. 1934. The life forms of plants and statistical plant
geography. Oxford: Clarendon Press. 632 p. [2843]
28. Roberts, Warren G.; Howe, J. Greg; Major, Jack. 1980. A survey of
riparian forest flora and fauna in California. In: Sands, Anne, editor.
Riparian forests in California: Their ecology and conservation:
Symposium proceedings. Davis, CA: University of California, Division of
Agricultural Sciences: 3-19. [5271]
29. U.S. Department of Agriculture, Soil Conservation Service. 1994. Plants
of the U.S.--alphabetical listing. Washington, DC: U.S. Department of
Agriculture, Soil Conservation Service. 954 p. [23104]
30. 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. [4240]
31. Welsh, Stanley L.; Atwood, N. Duane; Goodrich, Sherel; Higgins, Larry
C., eds. 1987. A Utah flora. Great Basin Naturalist Memoir No. 9. Provo,
UT: Brigham Young University. 894 p. [2944]
32. Willoughby, John W.; Davilla, William. 1984. Plant species composition
and life form spectra of tidal streambanks and adjacent riparian
woodlands along the lower Sacramento River. In: Warner, Richard E.;
Hendrix, Kathleen M., eds. California riparian systems: Ecology,
conservation, and productive management: Proceedings of a conference;
1981 September 17-19; Davis, CA. Berkeley, CA: University of California
Press: 642-651. [5866]
33. Core, Earl L. 1974. Brambles. In: Gill, John D.; Healy, William M.,
compilers. Shrubs and vines for Northeastern wildlife. Gen. Tech. Rep.
NE-9. Broomall, PA: U.S. Department of Agriculture, Forest Service:
16-19. [8923]
34. Stickney, Peter F. 1989. Seral origin of species originating in northern
Rocky Mountain forests. Unpublished draft on file at: U.S. Department of
Agriculture, Forest Service, Intermountain Research Station, Fire
Sciences Laboratory, Missoula, MT; RWU 4403 files. 7 p. [20090]
35. U.S. Department of the Interior, National Biological Survey. [n.d.]. NP
Flora [Data base]. Davis, CA: U.S. Department of the Interior, National
Biological Survey. [23119]
Index
Related categories for Species: Rubus discolor
| Himalayan Blackberry
|
 |
