Potentilla ovina |
Potentilla angelliae |
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sheep cinquefoil |
Angell's or Boulder Mountain cinquefoil, Boulder Mountain cinquefoil |
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Habit | Plants rosetted to ± matted; taproots sometimes ± fleshy-thickened. | |||||
Stems | prostrate to ascending, (0.3–)0.8–2(–3.5) dm, lengths (1–)1.5–3 times basal leaves. |
(0.4–)0.6–1.1 dm, lengths 2–3 times basal leaves. |
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Basal leaves | pinnate with distal leaflets ± distinct, (1.5–)2–10(–13) × 0.7–3.5(–5) cm; petiole 0.5–3.5(–5) cm, straight hairs sparse to abundant, sometimes absent (var. decurrens), ± appressed to ascending, 1 mm, ± stiff, cottony hairs absent, glands sparse, often obscured; primary lateral leaflets 3–6 per side (often with additional interspersed leaflets), on distal 1/2–2/3(–3/4) of leaf axis, ± separate to ± overlapping, largest ones narrowly cuneate-oblanceolate to ± obovate, (0.3–)0.5–2(–3.5) × (0.2–)0.3–0.8(–1) cm, distal 1/4 to whole margin unevenly to pinnately (at least distal leaflets of var. ovina) incised 1/2–3/4+ to midvein, ultimate teeth 2–9(–11), linear or oblong to ovate, 1–7(–9) × 1–2 mm, apical tufts 0.5–2 mm, surfaces green to grayish, not glaucous, straight hairs sparse to abundant (sparser adaxially), sometimes absent (except on margins), loosely appressed, 0.5–2 mm, ± stiff, cottony hairs absent, crisped hairs sometimes sparse to common, glands absent or inconspicuous. |
subpinnate, 1 pair of leaflets separate from terminal leaflets, distal leaflets distinct, 1.5–5 cm; petiole 0.5–3(–4) cm, straight hairs abundant, loosely appressed to ascending, 1–2 mm, stiff, cottony hairs absent, glands sparse to abundant; leaflets 5, on distal (1/10–)1/5–1/4 of leaf axis, separate, proximal pair separated from others by 1–3 mm of leaf axis, central leaflets narrowly cuneate to oblanceolate, 0.5–1.5 × 0.3–0.6 cm, petiolules 1 mm, distal 1/4(–1/3) or less of margins incised 1/2 or less to midvein, teeth (0–)1(–2) per side, ± separate, 1 mm, surfaces ± dissimilar, abaxial grayish to white, straight hairs ± abundant, appressed, 1–1.5 mm, ± stiff, cottony hairs abundant to sparse, glands ± sparse or obscured, adaxial greenish, straight hairs abundant, ± appressed, 1–1.5(–2) mm, stiff, cottony hairs absent, glands sparse to abundant. |
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Cauline leaves | 1–2. |
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Inflorescences | (1–)2–11(–20)-flowered, usually openly cymose. |
solitary flowers or 2–3-flowered. |
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Pedicels | (0.8–)1–2(–4) cm, straight to ± recurved in fruit. |
(1–)1.5–3 cm. |
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Flowers | epicalyx bractlets linear-lanceolate to narrowly elliptic, sometimes doubled, 2–3.5(–5) × 1 mm; hypanthium 3–5 mm diam.; sepals 3.5–5.5(–7) mm, apex acute to obtuse; petals 4–7(–8) × 3.5–8 mm; filaments 1–2.5 mm, anthers 0.4–1 mm usually ± 1/2 as long as filaments; carpels 10–20, styles 2–3 mm. |
epicalyx bractlets lanceolate-elliptic to ovate, 2–4 × 0.8–1.5 mm; hypanthium 3–5 mm diam.; sepals 3–5(–6) mm, apex ± acute; petals (4–)5–6.5 × 4–5.5 mm; filaments 1.5–2.5 mm, anthers 0.7–1 mm; carpels 10–30, styles 2–2.5 mm. |
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Achenes | 1.5–2 mm, smooth, not carunculate. |
1.5–2 mm, smooth to faintly rugose. |
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Potentilla ovina |
Potentilla angelliae |
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Phenology | Flowering summer. | |||||
Habitat | Rocky subalpine meadows | |||||
Elevation | 3300–3400 m (10800–11200 ft) | |||||
Distribution |
CO; ID; MT; NV; OR; UT; WY; AB; BC
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UT |
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Discussion | Varieties 2 (2 in the flora). Potentilla ovina is here accepted as an implicit new name by J. M. Macoun for P. diversifolia var. pinnatisecta, in agreement with N. H. Holmgren (1997b). In contrast, B. C. Johnston (1980) considered the names heterotypic. Potentilla ovina has priority at the species rank over P. pinnatisecta by one month. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Potentilla angelliae is known only from Boulder Mountain on the Aquarius Plateau in Garfield and Wayne counties. Comparable plants, whose status has yet to be resolved, have been collected in Montezuma County, Colorado. S. L. Welsh et al. (1993) suggested that P. angelliae might best be treated as a variety of P. concinna; the combination of subpalmate leaves, tridentate leaflets, and relatively few-flowered inflorescences extending beyond the leaves makes P. angelliae a well-defined species with no evidence of intergradation. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 9, p. 171. | FNA vol. 9, p. 180. | ||||
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Multijugae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Concinnae | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. diversifolia var. pinnatisecta, P. pinnatisecta, P. plattensis var. pinnatisecta | |||||
Name authority | J. M. Macoun: Canad. Rec. Sci. 6: 464. (1896) | N. H. Holmgren: Brittonia 39: 342, fig. 2. (1987) | ||||
Web links |