Potentilla pseudosericea
Potentilla supina
Mono cinquefoil, Pennsylvania cinquefoil, silky cinquefoil, strigose cinquefoil
bushy cinquefoil, spreading cinquefoil
sometimes sheathed with marcescent whole leaves.
decumbent to ascending, (0.2–)0.5–1.5(–2.2) dm.
usually palmate, rarely also ternate on same plant or subpalmate, (1–)2–6(–8) cm;
petiole (0.5–)1–2.5 cm, long hairs abundant to dense, ± appressed, 0.5–1.2 mm, stiff, verrucose, crisped hairs common, cottony hairs absent, glands sparse to abundant but usually obscured;
leaflets (3–)5–7, proximalmost separated by 0–2 mm, central ± obovate, (0.5–)1–1.5(–2) × (0.3–)0.5–0.8(–1) cm, petiolules 0–1 mm, distal 3/4 to nearly whole margin incised 3/4+ to midvein, teeth 2–4(–5) per side, (2–)3–6(–10) mm, apical tufts 0.5 mm, abaxial surfaces white, long hairs common to abundant, cottony-crisped hairs dense, short hairs and glands absent or obscured, adaxial grayish green, long hairs abundant, 0.5–1.5 mm, ± stiff, short-crisped (rarely ± cottony) hairs sparse to common, glands absent or sparse.
1–3.
(1–)3–10(–20)-flowered, congested or ± elongating in fruit, branch angle 5–30°.
0.2–0.7 cm, proximal to 1.3 cm.
epicalyx bractlets narrowly elliptic, (1–)1.5–2.5(–3) × 0.5–1 mm;
hypanthium 3–4 mm diam.;
sepals 2–4(–5) mm, apex obtuse to bluntly acute, glands sparse, obscured;
petals pale yellow, not overlapping, 2–4 × 2–3 mm, ± equal to sepals (slightly longer than in Inyo County);
filaments 1–1.5 mm, anthers 0.3–0.5 mm;
carpels 30–50, styles 1–1.2 mm.
1–1.4 mm.
Potentilla pseudosericea
Potentilla supina
Potentilla pseudosericea is currently confirmed only from the central Sierra Nevada and Sweetwater and White mountains of California (B. Ertter 2008). The species is similar to P. modesta but has a more tightly strigose, silvery vestiture and more numerous and deeply incised leaflets.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Subspecies 7 (1 in the flora).
The status of Potentilla supina in North America is open to question, given the otherwise Eurasian and northern African distribution of the species and ease of transport by migratory waterfowl. Although North American material has commonly been treated as a distinct species (P. paradoxa), E. Hultén and M. Fries (1986) went so far as to consider P. supina introduced in North America. The use of subspecies within a broadly defined P. supina follows J. Soják (1987, 1993) and is also adopted by A. Kurtto et al. (in J. Jalas et al. 1972+, vol. 13).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA- Local floras:
OR, 
WA - Local Web sites:
Flora NW, 
IL Wildflowers, 
KS Wildflowers, 
LA Plants, 
MI Flora, 
MN Wildflowers, 
MO Plants, 
PNW Herbaria 
WildflowerSearch
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USDA Plants Database- LBJ Wildflower Center
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