Potentilla supina |
Potentilla thuringiaca |
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bushy cinquefoil, spreading cinquefoil |
European cinquefoil, German cinquefoil, potentille de thuringe |
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Glands | sparse, uncolored, minute. |
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Stems | 1.5–5(–7) dm. |
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Basal leaves | 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 | 1–3; stipules fused with less than 1/3 of petiole, free portion longer than fused portion. |
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Inflorescences | 5–20-flowered. |
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Pedicels | 1–3 cm (proximalmost to 5 cm). |
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Flowers | 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 | 1–1.2 mm, faintly rugose. |
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2n | = 42, 56 (Eurasia). |
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Potentilla supina |
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; IA; ID; IL; KS; LA; MI; MN; MO; MT; ND; NE; NM; NY; OH; OK; OR; PA; SD; TX; UT; WA; WY; AB; BC; MB; NT; ON; SK; Mexico; Eurasia; Africa [Introduced in Australia]
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RI; QC; Eurasia [Introduced in North America] |
Discussion | Subspecies 7 (1 in the flora). The status of Potentilla supina in North America is open to question, given the otherwise Eurasian and northern African distribution of the species and ease of transport by migratory waterfowl. Although North American material has commonly been treated as a distinct species (P. paradoxa), E. Hultén and M. Fries (1986) went so far as to consider P. supina introduced in North America. The use of subspecies within a broadly defined P. supina follows J. Soják (1987, 1993) and is also adopted by A. Kurtto et al. (in J. Jalas et al. 1972+, vol. 13). (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.) |
Source | FNA vol. 9, p. 139. | FNA vol. 9, p. 146. |
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Rivales | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Chrysanthae |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | P. chrysantha subsp. thuringiaca, P. goldbachii, P. nestleriana | |
Name authority | Linnaeus: Sp. Pl. 1: 497. (1753) | Bernhardi ex Link: Enum. Hort. Berol. Alt. 2: 64. (1822) |
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