Potentilla ovina |
Potentilla thuringiaca |
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sheep cinquefoil |
European cinquefoil, German cinquefoil, potentille de thuringe |
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Habit | Plants rosetted to ± matted; taproots sometimes ± fleshy-thickened. | |||||
Glands | sparse, uncolored, minute. |
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Stems | prostrate to ascending, (0.3–)0.8–2(–3.5) dm, lengths (1–)1.5–3 times basal leaves. |
1.5–5(–7) dm. |
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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. |
4–25(–35) cm; petiole 2–20(–25) cm, hairs sparse to common, ± spreading, 1–2.5 mm, weak, glands absent or sparse; leaflets 5–7(–9), central one narrowly to broadly oblanceolate, 1–6(–9) × 0.5–2 cm, distal 2/3–3/4+ of margin incised 1/4–1/3(–1/2) to midvein, teeth (4–)6–10(–13) per side, surfaces ± similar, abaxial green to pale green, hairs sparse to common on primary veins, ascending to spreading, 0.5–1.5 mm, weak, adaxial green, hairs more appressed and shorter. |
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Cauline leaves | 1–2. |
1–3; stipules fused with less than 1/3 of petiole, free portion longer than fused portion. |
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Inflorescences | (1–)2–11(–20)-flowered, usually openly cymose. |
5–20-flowered. |
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Pedicels | (0.8–)1–2(–4) cm, straight to ± recurved in fruit. |
1–3 cm (proximalmost to 5 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 linear to lanceolate, 3–8 × 1–1.5(–2) mm; hypanthium 3–5 mm diam.; sepals 3–5 mm, apex ± acute; petals (5–)8–10 × 4–10 mm; filaments 0.3–1.5 mm, anthers 0.7–0.9 mm; carpels 35–50, styles 1.1–1.3 mm. |
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Achenes | 1.5–2 mm, smooth, not carunculate. |
1–1.2 mm, faintly rugose. |
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2n | = 42, 56 (Eurasia). |
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Potentilla ovina |
Potentilla thuringiaca |
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Phenology | Flowering late spring–summer. | |||||
Habitat | Edges of and openings in hardwood and conifer woodlands | |||||
Elevation | 0–100 m (0–300 ft) | |||||
Distribution |
CO; ID; MT; NV; OR; UT; WY; AB; BC
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RI; QC; Eurasia [Introduced in North America] |
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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 thuringiaca might be mistaken for the more widely established P. intermedia of sect. Terminales. In addition to having flowering stems lateral to persistent basal leaves, P. thuringiaca has much larger petals (mostly 8–10 mm versus 4–5 mm), 5–9 leaflets, and tubercles at the bases of the long, spreading hairs. To the Quebec records (and subsequent collections) reported by R. Cayouette (1966) is added Block Island, Rhode Island (Fernald et al. 9650, GH). (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. 146. | ||||
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Multijugae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Chrysanthae | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. diversifolia var. pinnatisecta, P. pinnatisecta, P. plattensis var. pinnatisecta | P. chrysantha subsp. thuringiaca, P. goldbachii, P. nestleriana | ||||
Name authority | J. M. Macoun: Canad. Rec. Sci. 6: 464. (1896) | Bernhardi ex Link: Enum. Hort. Berol. Alt. 2: 64. (1822) | ||||
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