Potentilla ovina |
Potentilla cristae |
|||||
---|---|---|---|---|---|---|
sheep cinquefoil |
crested cinquefoil, crested potentilla |
|||||
Habit | Plants rosetted to ± matted; taproots sometimes ± fleshy-thickened. | Plants tufted to densely matted; caudex branches usually short, stout, sometimes embedded in old leaf bases. | ||||
Stems | prostrate to ascending, (0.3–)0.8–2(–3.5) dm, lengths (1–)1.5–3 times basal leaves. |
ascending to erect, 0.3–2 dm, lengths 2–3 times basal leaves. |
||||
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, 1–5(–9) cm; stipules: apex acute to obtuse; petiole 1–4 cm, long hairs absent or sparse to common, spreading to ascending, 0.5–2 mm, ± weak, glands sparse to abundant; leaflets 3, central flabellate, 0.4–2 × 0.5–1.5 cm, petiolule 1–3 mm, margins flat, distal 3/4+ deeply 3–5-lobed (sinuses extending 1/2 to nearly to midvein), lobes unevenly incised 1/4–1/2 to midvein, teeth 2–5 per lobe, surfaces similar, dark green, hairs ± sparse, 0.5–1.5 mm, glands sparse to abundant. |
||||
Cauline leaves | 1–2. |
|||||
Inflorescences | (1–)2–11(–20)-flowered, usually openly cymose. |
1–7-flowered. |
||||
Pedicels | (0.8–)1–2(–4) cm, straight to ± recurved in fruit. |
straight, 0.2–1.2(–2) cm, not much longer in fruit than in flower. |
||||
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 broadly ovate, 2–4 × 2 mm, margins flat; hypanthium 3.5–6 mm diam.; sepals 3–5 mm, apex broadly acute to obtuse; petals yellow, 3–5.5 × 4–5 mm; filaments 0.7–1.7 mm, anthers 0.5–0.6 mm; carpels 25–40, styles tapered-filiform, ± papillate-swollen in proximal 1/5–/1/3, 1.3–2 mm. |
||||
Achenes | 1.5–2 mm, smooth, not carunculate. |
1–1.5 mm, dorsally crested. |
||||
2n | = 42. |
|||||
Potentilla ovina |
Potentilla cristae |
|||||
Phenology | Flowering summer. | |||||
Habitat | Rocky, open, serpentine slopes, in conifer woodlands | |||||
Elevation | 1800–2800 m (5900–9200 ft) | |||||
Distribution |
CO; ID; MT; NV; OR; UT; WY; AB; BC
|
CA |
||||
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 cristae is known only from Cory Peak, Mount Eddy, and the Marble Mountains in northwestern California. In addition to the characteristics in the key, the species is distinctive in having a low dorsal crest on the achenes, hence the specific epithet. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||
Key |
|
|||||
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 | |||||
Name authority | J. M. Macoun: Canad. Rec. Sci. 6: 464. (1896) | Ferlatte & Strother: Madroño 37: 190, fig. 1. (1990) | ||||
Web links |