Potentilla subviscosa |
Potentilla macounii |
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Mogollon cinquefoil, Navajo cinquefoil |
Macoun's cinquefoil |
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Stems | 0.2–1.5(–2) dm. |
0.4–1.5(–2) dm, lengths 2 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. |
subpinnate to pinnate, usually at least 2 pairs of leaflets separate from terminal leaflets, distal leaflets often confluent, 2–7 cm; petiole 1–4(–8) cm, straight hairs abundant, ± appressed to ascending, 1–2 mm, stiff to weak, cottony hairs sometimes present, glands absent or obscured; leaflets 5–9(–11), on distal 1/5–1/2 of leaf axis, strongly overlapping, proximal pair separate from others by 1–5 mm of leaf axis, central leaflets oblanceolate to obovate, sometimes lobed, (0.5–)1–1.5 × 0.5–1 cm, petiolules 0–1 mm, distal 2/3 of margins incised 1/2+ to midvein, teeth 2–5 per side, touching, 1–3 mm, surfaces ± dissimilar, abaxial white, straight hairs ± abundant, ± appressed, 1–1.5 mm, weak to stiff, cottony hairs ± dense, glands absent or obscured, adaxial greenish gray, straight hairs sparse to abundant, usually appressed, sometimes ascending, 1 mm, usually ± stiff, sometimes soft, cottony hairs sparse, glands obscured. |
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Inflorescences | (1–)3–15-flowered. |
(1–)3–6(–10)-flowered. |
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Pedicels | 0.5–1.5(–2) cm. |
0.8–2 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 to ovate-elliptic, 2.5–4 × 0.8–1.5 mm; hypanthium 3–4 mm diam.; sepals (3–)3.5–5.5(–6) mm, apex ± acute; petals 6–7 × 5–7 mm; filaments 1.5–3 mm, anthers 0.8–1 mm; carpels 15–20, styles 2–2.5 mm. |
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Achenes | 1.5–2 mm, ± rugose. |
1.5–2 mm, smooth. |
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Short | hairs well differentiated from long hairs, ± abundant to dense throughout. |
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Potentilla subviscosa |
Potentilla macounii |
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Phenology | Flowering early summer. | |||||
Habitat | Rocky slopes, outcrops, gravel banks, prairies | |||||
Elevation | 1200–2200 m (3900–7200 ft) | |||||
Distribution |
AZ; CO; NM
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MT; AB |
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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 macounii differs from other species in sect. Concinnae in the combination of subpinnate leaves, with at least two proximal pairs of leaflets separated from the terminal leaflets, and in having somewhat softer hairs. It occurs on the eastern slopes of the Rocky Mountains in southwestern Alberta (where of conservation concern) and in western Montana. Some problematic collections from the Absaroka Range in western Wyoming are most comparable to P. macounii, but have softer vestiture and somewhat larger, less divided, more subpalmate leaves. If these Wyoming populations were included in P. macounii, the upper elevation range would be 3300 m. (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. 180. | ||||
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Subviscosae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Concinnae | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. concinna var. macounii | |||||
Name authority | Greene: Bull. Torrey Bot. Club 8: 97. (1881) | Rydberg: Monogr. N. Amer. Potentilleae, 101, plate 41, figs. 1, 2. (1898) | ||||
Web links |