Pallas ex. Pursh
Potentilla villosa is a species of flowering plant in the rose family, Rosaceae. Its common names include villous cinquefoil, northern cinquefoil, and hairy cinquefoil. It is native to northwestern North America, where its distribution extends from Alaska to Alberta to Oregon. There are records from eastern Asia.
Habitat and ecology
This 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 to 30 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. Each petal is marked with an orange basal spot. There are usually 20 stamens at the center. Flowering occurs in July through September. The fruit is an achene, borne in clusters.
- "Potentilla villosa". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 13 October 2015.
- Potentilla villosa. NatureServe. 2012.
- Potentilla villosa. Lady Bird Johnson Wildflower Center. University of Texas at Austin.
- Potentilla villosa. USDA PLANTS.
- Potentilla villosa. In: Klinkenberg, B. (Ed.) 2013. E-Flora BC: Electronic Atlas of the Plants of British Columbia. University of British Columbia, Vancouver.
- 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.
- Potentilla villosa. Burke Museum. University of Washington.