Potentilla subviscosa |
Potentilla paucijuga |
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Mogollon cinquefoil, Navajo cinquefoil |
La Sal cinquefoil |
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Caudex branches | not sheathed with marcescent whole leaves. |
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Stems | 0.2–1.5(–2) dm. |
decumbent to ascending, 0.5–2(–2.5) dm. |
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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. |
subpalmate, (2–)3–8 cm; petiole 1–4 cm, long hairs sparse to abundant, ascending to spreading, 0.5–2.5 mm, weak to ± stiff, scarcely to ± verrucose, short-crisped hairs abundant, cottony hairs absent, glands sparse to common; leaflets (3–)5(–7), proximalmost separated by 1–5 mm, central narrowly obovate-elliptic, (1–)1.5–2.5(–3) × 0.8–1.5 cm, petiolules 0–1 mm, distal 3/4 to whole margin incised 2/3–3/4 to midvein, teeth 5–7 per side, (2–)3–6 mm, apical tufts 0.5–1 mm, abaxial surfaces grayish white to white, long hairs abundant, cottony-crisped hairs usually dense, short hairs and glands absent or sparse, adaxial grayish green, long hairs common to abundant, 1–2 mm, ± stiff, short-crisped hairs abundant, cottony hairs absent, glands sparse to common. |
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Cauline leaves | 1–2. |
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Inflorescences | (1–)3–15-flowered. |
(3–)5–10-flowered, congested or ± elongating in fruit, branch angle 10–30°. |
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Pedicels | 0.5–1.5(–2) cm. |
0.2–1 cm, proximal to 1.5 cm. |
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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 ± lanceolate, (2–)3–5(–6) × 0.5–1.5 mm; hypanthium 3.5–5 mm diam.; sepals 4–6 mm, apex narrowly acute, glands ± common, only partly obscured; petals yellow, ± overlapping, (4–)5–6 × 4.5–5.5 mm, longer than sepals; filaments 0.5–2 mm, anthers 0.7 mm; carpels 50–70, styles 1.2–1.5 mm. |
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Achenes | 1.5–2 mm, ± rugose. |
1.3 mm. |
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Short | hairs well differentiated from long hairs, ± abundant to dense throughout. |
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Potentilla subviscosa |
Potentilla paucijuga |
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Phenology | Flowering summer. | |||||
Habitat | Alpine tundra, patches of turf in talus | |||||
Elevation | 3300–3700 m (10800–12100 ft) | |||||
Distribution |
AZ; CO; NM
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UT |
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Potentilla paucijuga is a distinctive species endemic to the La Sal Mountains in Grand and San Juan counties. Diagnostic features include silvery-silky subpalmate leaves, relatively showy flowers with elongate epicalyx bractlets and sepals, and styles that are nearly 1.5 mm. In Colorado (for example, W. A. Weber and R. C. Wittman 1996), P. pensylvanica var. paucijuga has been applied to what is treated here as P. jepsonii (sect. Pensylvanicae). (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. 210. | ||||
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Subviscosae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Rubricaules | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. pensylvanica var. paucijuga, P. rubricaulis var. paucijuga | |||||
Name authority | Greene: Bull. Torrey Bot. Club 8: 97. (1881) | Rydberg: in N. L. Britton et al., N. Amer. Fl. 22: 348. (1908) | ||||
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