Potentilla subviscosa |
Potentilla vulcanicola |
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Mogollon cinquefoil, Navajo cinquefoil |
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Habit | Plants densely tufted. | |||||
Caudex branches | stout, sometimes ± columnar, not sheathed with marcescent whole leaves. |
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Stems | 0.2–1.5(–2) dm. |
ascending to erect, (0.2–)0.4–1.6(–2) dm, lengths 2–3 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. |
1–6(–11) cm; petiole 0.5–4(–9) cm, long hairs ± abundant, ascending to spreading, sometimes loosely appressed, 1–2.5 mm, soft to weak, smooth, crisped(/cottony) hairs absent or sparse, sometimes common, glands absent or sparse; leaflets overlapping, central broadly obovate, 0.8–2(–2.5) × 0.8–1.5(–2.5) cm, sessile or subsessile, base broadly cuneate, margins strongly revolute, distal 1/2–2/3 incised ± 1/2 to midvein, teeth 2–3(–4) per side, distant, surfaces strongly dissimilar, abaxial grayish white, long hairs 1–2 mm, cottony-crisped hairs ± dense, adaxial usually dark green, sometimes grayish green, long hairs sparse to abundant, other hairs usually absent. |
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Cauline leaves | (0–)1–2(–3). |
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Inflorescences | (1–)3–15-flowered. |
1–2(–5)-flowered. |
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Pedicels | 0.5–1.5(–2) cm. |
1–2 cm in flower, to 5 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 ± oblong to ovate, 4–8(–10) × 1.8–3(–5) mm, 2/3 to as wide as sepals, margins revolute, sometimes flat, red glands absent; hypanthium 3.5–4.5 mm diam.; sepals 5–8 mm, apex ± acute; petals 7–9 × 7–10 mm, longer than sepals; filaments 0.8–1 mm, anthers 0.6–0.7 mm; carpels 20–30, apical hairs sparse to abundant (straight), styles conic-columnar, ± papillate-swollen in less than proximal 1/5, or sometimes to 1/5, 0.8–1.1 mm. |
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Achenes | 1.5–2 mm, ± rugose. |
0.9–1.2 mm. |
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Short | hairs well differentiated from long hairs, ± abundant to dense throughout. |
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2n | = 28 (Russian Far East). |
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Potentilla subviscosa |
Potentilla vulcanicola |
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Phenology | Flowering late spring to summer. | |||||
Habitat | Dry alpine heaths, ridge crests, rock outcrops, herb slopes, scree and talus, stabilized sand dunes, mainly on calcareous bedrock | |||||
Elevation | 0–3100 m (0–10200 ft) | |||||
Distribution |
AZ; CO; NM
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AK; NT; NU; YT; 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 vulcanicola is close morphologically to P. uniflora in the narrow sense and largely replaces it in southern and eastern Chukotka, Alaska, and northwestern Canada, where it reaches east of Mackenzie River on the coastal mainland and the westernmost islands (Banks and Victoria islands). Potentilla subgorodkovii and P. vulcanicola account for a major part of North American records of P. uniflora. (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. 203. | ||||
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Subviscosae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Niveae | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Greene: Bull. Torrey Bot. Club 8: 97. (1881) | Juzepczuk: Bot. Mater. Gerb. Bot. Inst. Komarova Akad. Nauk SSSR 17: 222. (1955) | ||||
Web links |