Potentilla subviscosa |
Potentilla villosa |
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Mogollon cinquefoil, Navajo cinquefoil |
hairy cinquefoil, northern cinquefoil, villous cinquefoil |
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Habit | Plants ± to densely tufted. | |||||
Caudex branches | stout, sometimes short-columnar, not sheathed with marcescent whole leaves. |
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Stems | 0.2–1.5(–2) dm. |
ascending, 0.5–2(–2.5) dm, lengths 1.5–3 times basal leaves. |
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Basal leaves | palmate, rarely ternate, (1–)2–7(–18) cm; petiole (0.5–)1–5(–11) cm, long hairs sparse to abundant, ± spreading (to ascending), 1–3(–4) mm, ± weak, glands ± abundant; leaflets (3–)5(–7), central flabellate to obovate-cuneate or oblanceolate, (0.5–)1–3(–8) × 0.5–2 cm, not or ± petiolulate, distal 2/3–3/4 of margins evenly to unevenly incised 1/5–3/4 to midvein, sometimes deeply lobed as well, teeth 2–9 per side (some secondarily toothed as well), surfaces green, long hairs sparse to common, 1–2 mm (late-season leaves and adaxial surfaces sometimes nearly glabrate), glands sparse to abundant. |
2–12(–15) cm; petiole 1–9(–12) cm, long hairs ± abundant to dense, spreading to ascending, 1–2.5(–3) mm, soft to weak, smooth, crisped hairs absent or sparse, cottony hairs absent, glands sparse to common, sometimes obscured; leaflets usually ± overlapping, central broadly obovate to suborbiculate, (0.5–)1.5–2.5(–3) × (0.5–)1.5–2.6(–3.2) cm, sessile to subsessile, base cuneate to rounded, margins revolute, distal 1/2–2/3(–3/4) incised 1/4–1/2 to midvein, teeth 3–6(–7) per side, ± approximate to ± distant, surfaces ± dissimilar, abaxial yellowish or grayish white, long hairs 1–2 mm, cottony-crisped hairs ± dense, adaxial grayish green, long hairs abundant to dense, crisped hairs absent, sparse, or obscured. |
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Cauline leaves | (0–)1–2. |
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Inflorescences | (1–)3–15-flowered. |
(1–)2–7(–10)-flowered. |
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Pedicels | 0.5–1.5(–2) cm. |
0.5–3(–4) cm in flower, to 4 cm in fruit. |
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Flowers | epicalyx bractlets lanceolate-elliptic, 1.5–3(–5) × 0.5–1.5 mm; hypanthium 2.5–4 mm diam.; sepals (2.5–)3–5(–6) mm, apex ± acute; petals nearly white abaxially, pale yellow adaxially, narrowly obcordate, 3–6(–8) × 2.5–5 mm; filaments 1.5–2.5 mm, anthers 0.5–1 mm; carpels 4–12, styles 2–3 mm. |
epicalyx bractlets ovate to oval-elliptic, 3–8 × 2–5 mm, 2/3 to as wide as sepals, margins strongly revolute, red glands absent; hypanthium 5–7 mm diam.; sepals 4–8 mm, apex ± acute; petals (5–)7–15 × 7–16 mm, significantly longer than sepals; filaments 1.8–2.1 mm, anthers 0.7–0.8 mm; carpels 150–250, apical hairs usually absent, rarely present (cottony), styles narrowly conic to tapered, ± papillate-swollen on proximal 1/5–1/2, 0.9–1.1 mm. |
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Achenes | 1.5–2 mm, ± rugose. |
0.9–1.3 mm. |
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Short | hairs well differentiated from long hairs, ± abundant to dense throughout. |
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2n | = 14. |
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Potentilla subviscosa |
Potentilla villosa |
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Phenology | Flowering spring–summer. | |||||
Habitat | Sea cliffs, gravel beaches, inland on alpine outcrops (primarily southern populations), pumice barrens, scree and rock ledges | |||||
Elevation | 0–100(–1800) m (0–300(–5900) ft) | |||||
Distribution |
AZ; CO; NM
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AK; OR; WA; BC; e Asia (Russian Far East)
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Potentilla villosa is the only documented diploid species of sect. Niveae in North America and, almost certainly, it is fully sexual. It is a characteristic species of coarse-grained beaches and coastal cliffs from southwestern British Columbia to western Alaska and the Russian Far East, and also occurs on scattered mountains in the Olympic Peninsula and Cascade Range of Washington and Oregon (providing the higher elevational extreme). These southern populations, which have been called var. parviflora, tend to be smaller, more delicate, less hairy plants in general, with fewer and smaller flowers. At least some plants in some southern populations also have cottony hairs on the carpels. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 9, p. 184. | FNA vol. 9, p. 201. | ||||
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Subviscosae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Niveae | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. villosa var. parviflora | |||||
Name authority | Greene: Bull. Torrey Bot. Club 8: 97. (1881) | Pallas ex Pursh: Fl. Amer. Sept. 1: 353. (1813) | ||||
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