Potentilla ovina |
Potentilla grayi |
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sheep cinquefoil |
Gray's cinquefoil |
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Habit | Plants rosetted to ± matted; taproots sometimes ± fleshy-thickened. | Plants rosetted or ± tufted; caudex branches absent or short to elongate, stout to slender. | ||||
Stems | prostrate to ascending, (0.3–)0.8–2(–3.5) dm, lengths (1–)1.5–3 times basal leaves. |
ascending to erect, (0.4–)1–2 dm, lengths 2–4 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. |
not in ranks, ternate, (1–)2–5(–7) cm; stipules: apex acute to rounded; petiole 1–4 cm, hairs absent or long hairs sparse to common, appressed, 0.5–1 mm, stiff, glands absent; leaflets 3, central obovate to flabellate, 1–2.5 × 0.5–2 cm, petiolule (1–)3–10 mm, margins flat, not lobed, distal 1/2–3/4 ± evenly incised 1/4–1/2 to midvein, teeth (2–)3(–4) per side, not secondarily toothed, surfaces similar, green, sometimes ±glaucous, hairs absent or sparse to common, 0.5 mm, glands absent. |
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Cauline leaves | 1–2. |
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Inflorescences | (1–)2–11(–20)-flowered, usually openly cymose. |
1–6-flowered. |
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Pedicels | (0.8–)1–2(–4) cm, straight to ± recurved in fruit. |
straight, 0.5–2 cm in flower, to 5 cm in fruit. |
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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 elliptic to oval, 2–4.5 × 1–2 mm, margins flat; hypanthium 2.5–4 mm diam.; sepals 3–5.5 mm, apex acute to obtuse; petals yellow, 4–7 × 4–6 mm; filaments 1–3 mm, anthers 0.5–0.9 mm; carpels 10–30, styles filiform, not or slightly papillate-swollen proximally, 1–2.5 mm. |
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Achenes | 1.5–2 mm, smooth, not carunculate. |
1.2–1.5 mm. |
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Potentilla ovina |
Potentilla grayi |
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Phenology | Flowering summer. | |||||
Habitat | Moist stream banks, lakeshores, meadows, in conifer woodlands | |||||
Elevation | 2000–2800 m (6600–9200 ft) | |||||
Distribution |
CO; ID; MT; NV; OR; UT; WY; AB; BC
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CA |
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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.) |
Potentilla grayi occurs on the western slope of the Sierra Nevada from El Dorado County to Tulare County, well within the range of P. flabellifolia. Some collections are intermediate between the two. Potentilla grayi can be distinguished by its tendency to have glabrous or strigose leaves, distinctly petiolulate leaflets with simple teeth, paler yellow petals, and a less-branched caudex. The report of Potentilla grayi in New Mexico (J. D. Garcia 1970) was based on a specimen of P. norvegica (sect. Rivales). (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. 191. | ||||
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Multijugae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Aureae | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. diversifolia var. pinnatisecta, P. pinnatisecta, P. plattensis var. pinnatisecta | P. flabellifolia var. grayi | ||||
Name authority | J. M. Macoun: Canad. Rec. Sci. 6: 464. (1896) | S. Watson: Proc. Amer. Acad. Arts 8: 560. (1873) | ||||
Web links |