Potentilla subviscosa |
Potentilla holmgrenii |
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Mogollon cinquefoil, Navajo cinquefoil |
Holmgren's cinquefoil |
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Habit | Plants densely tufted to cushion-forming. | |||||
Caudex branches | stout, columnar, at least partly sheathed with marcescent whole leaves. |
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Stems | 0.2–1.5(–2) dm. |
ascending, 0.2–0.8 dm, lengths 1.5–2.5 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. |
1.5–4 cm; petiole 0.5–2 cm, long hairs absent or sparse to common (less so than cottony hairs), ± appressed, 1–2 mm, soft, smooth, cottony hairs dense, other hairs and glands absent, sparse, or obscured; leaflets touching to overlapping, central broadly elliptic to obovate, 0.7–1.1 × 0.5–0.6 cm, sessile or short-petiolulate, petiolule to 1 mm, base cuneate, margins revolute, distal 1/2–3/4 incised ± 1/2 to midvein, teeth 2–4 per side, approximate, surfaces ± dissimilar, abaxial white to grayish white, long hairs 1 mm, cottony-crisped hairs dense, adaxial grayish green to grayish white, long and short-crisped hairs abundant to dense. |
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Cauline leaves | 0–1. |
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Inflorescences | (1–)3–15-flowered. |
1–2(–3)-flowered. |
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Pedicels | 0.5–1.5(–2) cm. |
0.4–0.7 cm in flower, to 2 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 lanceolate to narrowly elliptic, 2–2.2 × 0.6–0.9 mm, 1/4–1/2 as wide as sepals, margins flat, red glands absent; hypanthium 1.8–2.2 mm diam.; sepals 3–3.5 mm, apex subacute; petals 4–5 × 2.5–4 mm, longer than sepals; filaments 1–1.5 mm, anthers 0.5 mm; carpels 30–40, apical hairs absent, styles narrowly columnar, not or ± papillate-swollen in proximal 1/5 or less, 1.2–1.4 mm. |
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Achenes | 1.5–2 mm, ± rugose. |
1.1–1.4 mm. |
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Short | hairs well differentiated from long hairs, ± abundant to dense throughout. |
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Potentilla subviscosa |
Potentilla holmgrenii |
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Phenology | Flowering summer. | |||||
Habitat | Wind-swept ridges, fellfields, rocky slopes | |||||
Elevation | 3300–4500 m (10800–14800 ft) | |||||
Distribution |
AZ; CO; NM
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NV; UT |
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Potentilla holmgrenii is known only from the Schell Creek and Snake ranges, Nevada, and Deep Creek Range, Utah. In addition to characteristics given in the key, lateral leaflets and leaflet teeth of P. holmgrenii are directed more forward than in P. nivea, leaflets are thicker and more densely hairy, and the terminal tooth is often orbiculate and frequently overlapped by the adjacent pair of lateral teeth. (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. 199. | ||||
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) | D. F. Murray & Elven: J. Bot. Res. Inst. Texas 1: 811, figs. 1, 2. (2007) | ||||
Web links |