Potentilla fruticosa Linnaeus
- genus Potentilla L.
Shrubs erect, usually many branched. Branches covered with reddish brown or gray, peeling bark, villous when young. Stipules broad, thinly membranous, abaxially villous or glabrescent; petiole sericeous or pilose; leaf blade pinnate with 2 pairs of leaflets, rarely 3-foliolate; leaflets oblong, obovate, or ovate-lanceolate, 7-20 mm long, 4-10 mm wide, abaxially sparsely pilose or subglabrous, adaxially sparsely pilose, sericeous, or subglabrous, inconspicuously elevated reticulate veined, margin flat, base cuneate, decurrent and adnate to rachis in apical pair of leaflets, margin entire, flat. Inflorescence terminal, laxly racemose or corymbiform, 1- to several flowered. Flowers 2.3-3 cm in diameter. Sepals ovate, apex acute to shortly acuminate; epicalyx segments lanceolate to obovate-lanceolate, nearly equaling sepals, sparsely sericeous-villous, apex acute to acuminate. Petals yellow, broadly obovate, nearly equaling sepals, apex rounded. Style sub-basal, clavate, thin proximally, constricted at base of dilated stigma. Achenes brown, subovate, ca. 1.5 mm, abaxially villous.
Potentilla fruticosa var. fruticosa is close relative of Potentilla fruticosa var. arbuscula, but differs from the latter in its leaflets abaxially sparsely pilose or subglabrous (vs. densely appressed white villous), adaxially inconspicuously elevated reticulate veined (vs. prominently elevated reticulate veined), margin flat (vs. strongly revolute).
The chromosomal number of Potentilla fruticosa is 2n = 14 (Guinochet and Lefranc, 1981).
Ecology and Distribution
Flowering and fruiting from June to September.
Potentilla fruticosa is occurring in Gansu, Hebei, Heilongjiang, Jilin, Liaoning, Nei Mongol, Shaanxi, Shanxi, Sichuan, Xinjiang, Xizang, Yunnan of China, Asia, Europe, North America.
Phylogeny of Potentilla and associated genera were inferred from nuclear ribosomal internal transcribed spacer (ITS) DNA sequences (Eriksson et al., 1998). Most parsimonious tree strongly implies that Potentilla is not monophyletic. Several morphological features appear to have evolved several times independently, including the swollen receptacle and ternate leaves.
Growing in dry forest margins, thickets, grassy mountain slopes, talus slopes; 1000-4000 m.
- Dasiphora fruticosa (Linnaeus) Rydberg (synonym)
- Dasiphora riparia Rafinesque (synonym)
- Pentaphylloides fruticosa (Linnaeus) O. Schwarz (synonym)
- Potentilla fruticosa var. rigida (Wallich ex Lehmann) Wolf (synonym)
- Potentilla rigida Wallich ex Lehmann (synonym)