| 词条 | Potentilla villosa |
| 释义 |
|image = Villous Cinquefoil (3818560466).jpg |status = G5 |status_system = TNC |genus = Potentilla |species = villosa |authority = Pallas ex. Pursh |synonyms = }}Potentilla villosa is a species of flowering plant in the rose family, Rosaceae. Its common names include villous cinquefoil,[1] northern cinquefoil,[2] and hairy cinquefoil.[3] It is native to northwestern North America, where its distribution extends from Alaska to Alberta to Oregon.[2][4] There are records from eastern Asia.[5] Habitat and ecologyThis is a coastal plant.[6] It occurs on coastal bluffs and beaches, and in meadows,[5] tundra, and alpine talus.[7] DescriptionThis is a rhizomatous perennial herb with a tuft of several hairy to woolly stems growing from a thick base covered in previous seasons' dead foliage. The stems are up to 20[7] to 30[5] centimeters tall. The thick, leathery basal leaves are compound, divided into three veiny, toothed leaflets with woolly to silky-haired undersides. There may be a few leaves higher on the stem which are nearly the same size. The inflorescence bears one to five flowers. The flower has a five-lobed calyx and five bractlets at the base. The bowl-shaped corolla has five notched yellow petals each up to 1.2 centimeters long.[5] Each petal is marked with an orange basal spot.[3] There are usually 20 stamens at the center.[5] Flowering occurs in July through September.[7] The fruit is an achene, borne in clusters.[5] References1. ^{{PLANTS|id=POVI4|taxon=Potentilla villosa|accessdate=13 October 2015}} {{Taxonbar|from=Q7234860}}2. ^1 Potentilla villosa. NatureServe. 2012. 3. ^1 Potentilla villosa. Lady Bird Johnson Wildflower Center. University of Texas at Austin. 4. ^Potentilla villosa. USDA PLANTS. 5. ^1 2 3 4 5 Potentilla villosa. In: Klinkenberg, B. (Ed.) 2013. E-Flora BC: Electronic Atlas of the Plants of British Columbia. University of British Columbia, Vancouver. 6. ^Elven, R. and D. F. Murray. The Potentilla villosa-uniflora group in northwestern North America. Botanical Electronic News 390. The University of Oklahoma. 12 March 2008. 7. ^1 2 Potentilla villosa. Burke Museum. University of Washington. 4 : Potentilla|Flora of Western Canada|Flora of the Western United States|Taxa named by Frederick Traugott Pursh |
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