Potentilla subviscosa |
Potentilla furcata |
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Mogollon cinquefoil, Navajo cinquefoil |
fork cinquefoil |
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Caudex branches | usually not sheathed with marcescent whole leaves. |
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Stems | 0.2–1.5(–2) dm. |
ascending to erect, (0.5–)1–3 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. |
often both ternate and palmate on same plant, sometimes subpalmate, 4–10 cm; petiole 2.5–8 cm, long hairs common to abundant, loosely appressed to ascending-spreading, 1–2 mm, weak to ± stiff, ± verrucose, short and/or crisped hairs sparse to abundant, cottony hairs absent, glands sparse to common; leaflets 3–5, proximalmost separated by 0(–2) mm, central oblong to obovate, 1.4–2.5(–5) × 0.6–1.3(–2) cm, petiolules 1–3(–5) mm, distal 2/3–3/4 of margin incised 1/2–3/4+ to midvein, teeth 3–5 per side, 3.5–6 mm, apical tufts 0.5–1 mm, abaxial surfaces grayish white to white, long hairs common to abundant, cottony-crisped hairs usually dense, short hairs and glands absent or obscured, adaxial green to grayish green, long hairs sparse to common, 0.5–1(–1.5) mm, ± stiff, short and/or crisped hairs sparse to common, sometimes abundant, cottony hairs absent, glands sparse to abundant. |
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Cauline leaves | 1–3. |
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Inflorescences | (1–)3–15-flowered. |
7–12(–20)-flowered, ± open, branch angle 5–30(–50)°. |
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Pedicels | 0.5–1.5(–2) cm. |
(0.5–)1–2 cm, proximal to 3 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 linear to narrowly lanceolate, 2–3.5 × 0.6–1 mm; hypanthium 2.5–3.5 mm diam.; sepals 2.5–4 mm, apex subacute to acute, glands ± common, usually not obscured; petals pale yellow, not overlapping, 3–5(–6) × 3–4(–5) mm, slightly longer than sepals; filaments 0.8–1.8 mm, anthers 0.4 mm; carpels 30–60, styles 0.7–0.9 mm. |
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Achenes | 1.5–2 mm, ± rugose. |
1.2 mm. |
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Short | hairs well differentiated from long hairs, ± abundant to dense throughout. |
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Potentilla subviscosa |
Potentilla furcata |
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Phenology | Flowering spring–summer. | |||||
Habitat | Sandy bluffs, dry riverbanks, limestone outcrops, grassy openings in dry forests, dry mountain slopes | |||||
Elevation | 100–2400 m (300–7900 ft) | |||||
Distribution |
AZ; CO; NM
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AK; BC; YT |
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Potentilla furcata is a characteristic species of the steppe bluffs of interior and south-central Alaska, Yukon, and northern British Columbia, mainly within the unglaciated Beringian region. It differs from P. rubricaulis in having less open inflorescences, smaller flowers, narrower petals, more papillae on styles, and denser glands on epicalyx and calyx. (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. 208. | ||||
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Subviscosae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Rubricaules | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. hookeriana var. furcata, P. rubricaulis var. furcata | |||||
Name authority | Greene: Bull. Torrey Bot. Club 8: 97. (1881) | A. E. Porsild: Bull. Natl. Mus. Canada 121: 224, plate 18. (1951) | ||||
Web links |