? Purshia
Purshia tridentata
Scientific classification
Kingdom: Plantae Division: Magnoliophyta Class: Magnoliopsida Order: Rosales Family: Rosaceae Genus: Purshia Spreng.
Species
See text Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms. ... Divisions Land plants (embryophytes) Non-vascular plants (bryophytes) Marchantiophyta - liverworts Anthocerotophyta - hornworts Bryophyta - mosses Vascular plants (tracheophytes) Lycopodiophyta - clubmosses Equisetophyta - horsetails Pteridophyta - true ferns Psilotophyta - whisk ferns Ophioglossophyta - adderstongues Seed plants (spermatophytes) †Pteridospermatophyta - seed ferns Pinophyta - conifers Cycadophyta - cycads Ginkgophyta - ginkgo Gnetophyta - gnetae Magnoliophyta - flowering plants Adiantum pedatum (a fern... Classes Magnoliopsida - Dicots Liliopsida - Monocots The flowering plants (also called angiosperms) are a major group of land plants. ... Orders see text Dicotyledons or dicots are flowering plants whose seed contains two embryonic leaves or cotyledons. ... Families Barbeyaceae Cannabaceae (hemp family) Dirachmaceae Elaeagnaceae Moraceae (mulberry family) Rosaceae (rose family) Rhamnaceae (buckthorn family) Ulmaceae (elm family) Urticaceae (nettle family) For the Philippine municipality, see Rosales, Pangasinan. ... Subfamilies Rosoideae Spiraeoideae Maloideae Amygdaloideae or Prunoideae The Rosaceae or rose family is a large family of plants, with about 3,000-4,000 species in 100-120 genera. ... Kurt Sprengel (August 3, 1766 - March 15, 1833) was a German botanist and physician. ...

Purshia (bitterbrush or cliff-rose) is a small genus of 5-8 species of flowering plants in the family Rosaceae, native to western North America, where they grow in dry climates from southeast British Columbia in Canada south throughout the western United States to northern Mexico. Classes Magnoliopsida - Dicots Liliopsida - Monocots The flowering plants (also called angiosperms) are a major group of land plants. ... Subfamilies Rosoideae Spiraeoideae Maloideae Amygdaloideae or Prunoideae The Rosaceae or rose family is a large family of plants, with about 3,000-4,000 species in 100-120 genera. ... World map showing North America A satellite composite image of North America North America is a continent in the northern hemisphere bordered on the north by the Arctic Ocean, on the east by the North Atlantic Ocean, on the south by the Caribbean Sea, and on the west by the... Motto: Splendor Sine Occasu (Latin: Splendour without diminishment) Official languages English Capital Victoria Largest city Vancouver Lieutenant-Governor Iona Campagnolo Premier Gordon Campbell (BC Liberal) Parliamentary representation  - House seat  - Senate seats 36 6 Area  - Total  - % water Ranked 5th 944,735 km² 2. ...

They are deciduous or evergreen shrubs, typically reaching 0.3-5 m tall. The leaves are small, 1-3 cm long, deeply three- to five-lobed, with revolute margins. The flowers are 1-2 cm diameter, with five white to pale yellow or pink petals and yellow stamens. The fruit is a cluster of dry, slender, leathery achenes 2-6 cm long. Deciduous means temporary or tending to fall off (deriving from the Latin word decidere, to fall off). ... A Silver Fir shoot showing three successive years of retained leaves In botany, an evergreen plant is a plant which retains its leaves year-round, with each leaf persisting for more than 12 months. ... A broom shrub in flower A shrub or bush is a horticultural rather than strictly botanical category of woody plant, distinguished from a tree by its multiple stems and lower height, usually less than 6 m tall. ... In botany, a leaf is an above-ground plant organ specialized for photosynthesis. ... Clivia miniata bears bright orange flowers. ... Fruit stall in Barcelona, Catalonia. ... An achene is a type of simple dry fruit produced by many species of flowering plants. ...

The evergreen species were treated separately in the genus Cowania in the past; this genus is still accepted by some botanists.

Species

• Purshia ericifolia - Heath Cliffrose. Texas.
• Purshia glandulosa - Desert Bitterbrush. Nevada, Utah, Arizona.
• Purshia mexicana - Mexican Cliffrose (syn. Cowania mexicana). Mexico, Arizona.
• Purshia pinkavae - Pinkava's Cliffrose. Arizona.
• Purshia plicata - Antelope Bush (syn. Cowania plicata). Mexico (Nuevo León).
• Purshia stansburiana - Stansbury Cliffrose (syn. P. mexicana var. stansburiana, Cowania stansburiana). Idaho south to California, Arizona and New Mexico.
• Purshia subintegra (possibly a hybrid between P. pinkavae and P. stansburiana). Arizona.
• Purshia tridentata - Antelope Bitterbrush. British Columbia south to California and New Mexico.

The classification of Purshia within the Rosaceae is presently unclear. The genus was originally placed in the subfamily Rosoideae, and later in subfamily Dryadeae along with the genera Cercocarpus, Chamaebatia and Dryas, all genera sharing root nodules that host the nitrogen-fixing bacterium Frankia. However, recent genetic research indicates that Dryadeae may be polyphyletic, with Dryas not closely related to the other genera. In biology, hybrid has three meanings. ... Binomial name Purshia tridentata (Pursh) DC. The Antelope Bitterbrush (Purshia tridentata), also called Buckbrush, is a nitrogen fixing shrub in the genus Purshia, native to mountainous areas of western North America ranging from southeastern British Columbia in the north, east to Montana and south to California and New Mexico. ... Genera Aphanes Dryas - mountain avens Filipendula Fragaria - strawberry Geum - avens Kerria Potentilla - cinquefoil Rhodotypos Rosa - rose Rubus - bramble fruit Waldsteinia The rose subfamily Rosoideae includes many shrubs and perennial herbs. ... Species - Birchleaf Mountain-mahogany - Hairy Mountain-mahogany - Littleleaf Mountain-mahogany - Curlleaf Mountain-mahogany - Alderleaf Mountain-mahogany - Catalina Island Mountain-mahogany Mountain-mahogany (Cercocarpus) is a small genus of five or six species of deciduous shrubs or small trees in the Rosaceae, native to the western United States and northern Mexico... Dryas Categories: Plant stubs | Plants ... Root nodules occur on the roots of plants that associate with symbiotic bacteria. ... Nitrogen fixation is the process by which nitrogen is taken from its relatively inert molecular form (N2) in the atmosphere and converted into nitrogen compounds useful for other chemical processes (such as, notably, ammonia, nitrate and nitrogen dioxide). ... Phyla/Divisions Actinobacteria Aquificae Bacteroidetes/Chlorobi Chlamydiae/Verrucomicrobia Chloroflexi Chrysiogenetes Cyanobacteria Deferribacteres Deinococcus-Thermus Dictyoglomi Fibrobacteres/Acidobacteria Firmicutes Fusobacteria Gemmatimonadetes Nitrospirae Omnibacteria Planctomycetes Proteobacteria Spirochaetes Thermodesulfobacteria Thermomicrobia Thermotogae Bacteria (singular, bacterium) are a major group of living organisms. ... Species Frankia alni Frankia is a genus of nitrogen fixing filamentous bacteria that live in symbiosis with actinorhizal plants, similar to Rhizobia. ...

P. tridentata, Lava Beds National Monument Lava Beds National Monument, located in Siskiyou and Modoc Counies, California, is the site of the largest concentration of lava tube caves in the United States. ...

P. tridentata, Red Rock Canyon, Nevada Red Rock Canyon Red Rock Canyon is managed by the BLM, and protected as the Red Rock Canyon National Conservation Area. ...

P. tridentata, Red Rock Canyon, Nevada

P. tridentata, Red Rock Canyon, Nevada

External links

• Jepson Flora Project: Purshia (click 'next taxon' to see species accounts of Californian species)
• USDA Plants Profile: Purshia
• Germplasm Resources Information Network: Purshia
• Phylogeny of Rosoideae (pdf file)