Potentilla newberryi |
Potentilla thuringiaca |
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Newberry's 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 | petiole 1–3.5 cm, long hairs ± abundant, 0.5–1.5 mm, short hairs absent or sparse, rarely common; leaflets 0.2–1 cm, lobes oblanceolate to narrowly elliptic, (0.5–)1–2 mm wide, longs hairs ± abundant, short hairs absent or sparse, 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. |
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 broadly lanceolate to elliptic, 1.5–4(–5) × (0.4–)0.8–1.3 mm; sepals 2–4(–5) mm, apex ± acute; petals (3–)4–6 × (2–)3–5 mm; filaments 1–2(–2.5) mm, anthers 0.4–0.6 mm; carpels 20–50. |
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. |
Achenes | 0.9–1.2 mm. |
1–1.2 mm, faintly rugose. |
2n | = 42, 56 (Eurasia). |
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Potentilla newberryi |
Potentilla thuringiaca |
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Phenology | Flowering summer. | Flowering late spring–summer. |
Habitat | Moist, sandy to clayey, more or less alkaline soil, especially where seasonally inundated near streams, ponds, and lakes | Edges of and openings in hardwood and conifer woodlands |
Elevation | 1300–1800 m (4300–5900 ft) | 0–100 m (0–300 ft) |
Distribution |
CA; NV; OR; WA
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RI; QC; Eurasia [Introduced in North America] |
Discussion | Potentilla newberryi grows in valley bottoms in south-central Oregon, northeastern California, and northwestern Nevada. The only specimen supposedly collected in south-central Washington (W. N. Suksdorf 2718, WTU) was gathered in 1898. (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. 137. | FNA vol. 9, p. 146. |
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Arenicolae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Chrysanthae |
Sibling taxa | ||
Synonyms | Ivesia gracilis | P. chrysantha subsp. thuringiaca, P. goldbachii, P. nestleriana |
Name authority | A. Gray: Proc. Amer. Acad. Arts 6: 532. (1865) — not P. gracilis Douglas ex Hooker 1830 | Bernhardi ex Link: Enum. Hort. Berol. Alt. 2: 64. (1822) |
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