Potentilla pseudosericea |
Potentilla crinita |
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Mono cinquefoil, Pennsylvania cinquefoil, silky cinquefoil, strigose cinquefoil |
bearded cinquefoil, Lemmon's cinquefoil |
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Caudex branches | sometimes sheathed with marcescent whole leaves. |
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Stems | decumbent to ascending, (0.2–)0.5–1.5(–2.2) dm. |
(0.5–)1.5–4.5 dm, lengths 2–4(–5) times basal leaves. |
Basal leaves | 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. |
pinnate, 3–15(–20) cm; petiole 1–10(–15) cm, long hairs dense, appressed, 1.5–2.5 mm, usually stiff, short and crisped hairs usually absent, cottony hairs absent, glands sparse, often obscured; leaflets often conduplicate, lateral ones evenly paired, (3–)4–6(–7) per side on distal 1/3–2/3 of leaf axis, distal pairs ± decurrent, often confluent with terminal leaflet, larger leaflets narrowly cuneate or oblanceolate to obovate, 1–3(–4) × 0.2–0.8(–1) cm, distal 1/4–1/2(–2/3) or less of margin incised ± 1/4 or less to midvein, teeth (0–)1–5(–9) per side, 1–2 mm, surfaces ± similar to ± dissimilar, abaxial silvery to greenish, long hairs usually dense (at least on primary veins), 1–2 mm, stiff, short-crisped hairs absent or sparse, cottony hairs usually absent, glands sparse to common, often obscured, adaxial ± green, long hairs sparse to common, sometimes absent, short, crisped, and cottony hairs absent, glands sparse. |
Cauline leaves | 1–3. |
1–3(–4). |
Inflorescences | (1–)3–10(–20)-flowered, congested or ± elongating in fruit, branch angle 5–30°. |
(5–)10–30-flowered. |
Pedicels | 0.2–0.7 cm, proximal to 1.3 cm. |
0.5–2(–4) cm. |
Flowers | 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. |
epicalyx bractlets lanceolate, 1.5–4.5 × 0.5(–1) mm, 1/2–2/3 as long as sepals, abaxial vestiture similar to or ± sparser than sepals, not glabrescent, straight hairs common, crisped or cottony hairs usually absent; hypanthium 2.5–5 mm diam.; sepals (3–)4–7 mm, apex acute to long acuminate; petals (3–)4.5–7.5(–8) × 4–6 mm; filaments 1–3 mm, anthers 0.6–1.1 mm; carpels 5–20, styles 1.6–2.6 mm. |
Achenes | 1–1.4 mm. |
1.4–1.7 mm, smooth or slightly rugose. |
Potentilla pseudosericea |
Potentilla crinita |
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Phenology | Flowering summer. | Flowering summer. |
Habitat | Alpine fellfields, moist gravel, talus, on dolomite and quartzite | Dry meadows, pygmy conifer, oak, aspen, or montane conifer woodlands |
Elevation | 3200–3600 m (10500–11800 ft) | 2000–2600 m (6600–8500 ft) |
Distribution |
CA
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AZ; CO; NM; NV; UT
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Discussion | 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.) |
Potentilla crinita occurs mainly in the upper foothills and mountains from southern Nevada to south-central Utah, northern Arizona, and northwestern New Mexico and is disjunct to southwestern Colorado (Archuleta County). It tends to grow on somewhat drier, rockier sites than co-occurring species of Potentilla. The often conduplicate leaflets, falcate in outline, bear relatively few, small teeth. Two varieties are sometimes recognized, based on leaflet and vestiture characters that do not reliably coincide. Potentilla crinita can hybridize with P. hippiana where the two species overlap, in spite of ecological partitioning. N. H. Holmgren (1997b) noted the type of P. crinita may be such a hybrid. If correct, then P. lemmonii would be used for the species unless the name P. crinita were to be conserved with a conserved type. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 209. | FNA vol. 9, p. 164. |
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Rubricaules | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Leucophyllae |
Sibling taxa | ||
Synonyms | Ivesia lemmonii, P. crinita var. lemmonii, P. lemmonii | |
Name authority | Rydberg: Monogr. N. Amer. Potentilleae, 98, plate 36, figs. 1–5. (1898) | A. Gray: Mem. Amer. Acad. Arts, n. s. 4: 41. (1849) |
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