Purshia tridentata
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Purshia tridentata, with the common name bitterbrush,[1][2][3] is a shrub in the genus Purshia of the family Rosaceae. It is native to mountainous areas of western North America.
Common names include antelope bitterbrush,[3][2] antelope bush,[2] buckbrush, quinine brush, and less commonly deerbrush, blackbrush, and greasewood.[4] Some of these names are shared with other species.
Description
Purshia tridentata is a deciduous shrub growing to a height of Script error: No such module "convert".. It has many branches and slender green,[5] three- to five-lobed leaves Script error: No such module "convert". long. It is a nitrogen-fixing plant.[6]
The flowers are pale yellow,[5] with five petals 6–8 mm long, and darker yellow anthers. The fruit is a cluster of dry, slender, leathery achenes each up to Script error: No such module "convert". long.[7]
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Varieties
There are two named varieties of the species:
- Purshia tridentata var. glandulosa — Eastern Sierra Nevada, Southern California[8]
- Purshia tridentata var. tridentata[9]
Distribution
The plant is found from southeastern British Columbia in the north, east to Montana and Wyoming, south to New Mexico, and west in California.[3] It grows on arid mountainsides and slopes, as well as rocky or drained soils with somewhat more moisture than the sagebrush steppe.[5] It is often associated with Balsamorhiza as well as Wyethia species, and in southern areas hybridizes with Purshia stansburyana.[5]
In California it occurs between Script error: No such module "convert". above sea level, including in the Peninsular Ranges, Transverse Ranges, and Sierra Nevada, and southern Cascade Range.[2][10] Further north it occurs at lower elevations, such as at Script error: No such module "convert". in British Columbia.[11]
Ecology
The shrub is an important forage plant for many game animals, including deer,[5] especially during the winter.[12]
References
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- ↑ a b c d CalFlora Database:Purshia tridentata . accessed 9.22.2013
- ↑ a b c Script error: No such module "template wrapper".
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- ↑ a b c d e Script error: No such module "citation/CS1".
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- ↑ CalFlora Database: Purshia tridentata var. glandulosa
- ↑ CalFlora Database: Purshia tridentata var. tridentata
- ↑ Brian Vanden Heuvel & Thomas J. Rosatti 2016. Purshia tridentata, in Jepson Flora Project (eds.) Jepson eFlora, accessed 19 June 2016
- ↑ E-FLORA BC: Electronic Atlas of the Flora of British Columbia
- ↑ Script error: No such module "citation/CS1".
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External links
- Pages with script errors
- Pages with reference errors
- Purshia
- Flora of the Northwestern United States
- Flora of the Southwestern United States
- Flora of British Columbia
- Flora of California
- Flora of New Mexico
- Flora of Wyoming
- Flora of the Cascade Range
- Flora of the Great Basin
- Flora of the Rocky Mountains
- Flora of the Sierra Nevada (United States)
- Natural history of the Peninsular Ranges
- Taxa named by Augustin Pyramus de Candolle
- Flora without expected TNC conservation status