Potentilla subviscosa |
Potentilla thuringiaca |
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Mogollon cinquefoil, Navajo cinquefoil |
European cinquefoil, German cinquefoil, potentille de thuringe |
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Glands | sparse, uncolored, minute. |
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Stems | 0.2–1.5(–2) dm. |
1.5–5(–7) dm. |
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Basal leaves | palmate, rarely ternate, (1–)2–7(–18) cm; petiole (0.5–)1–5(–11) cm, long hairs sparse to abundant, ± spreading (to ascending), 1–3(–4) mm, ± weak, glands ± abundant; leaflets (3–)5(–7), central flabellate to obovate-cuneate or oblanceolate, (0.5–)1–3(–8) × 0.5–2 cm, not or ± petiolulate, distal 2/3–3/4 of margins evenly to unevenly incised 1/5–3/4 to midvein, sometimes deeply lobed as well, teeth 2–9 per side (some secondarily toothed as well), surfaces green, long hairs sparse to common, 1–2 mm (late-season leaves and adaxial surfaces sometimes nearly glabrate), glands sparse to abundant. |
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 | (1–)3–15-flowered. |
5–20-flowered. |
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Pedicels | 0.5–1.5(–2) cm. |
1–3 cm (proximalmost to 5 cm). |
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Flowers | epicalyx bractlets lanceolate-elliptic, 1.5–3(–5) × 0.5–1.5 mm; hypanthium 2.5–4 mm diam.; sepals (2.5–)3–5(–6) mm, apex ± acute; petals nearly white abaxially, pale yellow adaxially, narrowly obcordate, 3–6(–8) × 2.5–5 mm; filaments 1.5–2.5 mm, anthers 0.5–1 mm; carpels 4–12, 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, ± rugose. |
1–1.2 mm, faintly rugose. |
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Short | hairs well differentiated from long hairs, ± abundant to dense throughout. |
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2n | = 42, 56 (Eurasia). |
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Potentilla subviscosa |
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 |
AZ; CO; NM
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RI; QC; Eurasia [Introduced in North America] |
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Discussion | Varieties 2 (2 in the flora). (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. 184. | FNA vol. 9, p. 146. | ||||
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Subviscosae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Chrysanthae | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. chrysantha subsp. thuringiaca, P. goldbachii, P. nestleriana | |||||
Name authority | Greene: Bull. Torrey Bot. Club 8: 97. (1881) | Bernhardi ex Link: Enum. Hort. Berol. Alt. 2: 64. (1822) | ||||
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