Potentilla newberryi |
Potentilla uschakovii |
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Newberry's cinquefoil |
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Caudex branches | often sheathed with marcescent whole leaves. |
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Stems | ascending to nearly erect, 0.3–1.5 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. |
often both ternate and palmate or subpalmate on same plant, 1–5 cm; petiole 0.5–3 cm, long hairs sparse to dense, ± appressed to ascending, (1–)1.5–2.5 mm, soft to ± weak, smooth, short hairs absent or sparse, crisped(/cottony) hairs sparse to common, glands absent or sparse; leaflets 3–5, proximalmost separated by 0–2 mm, central broadly elliptic to obovate, 0.5–2 × 0.3–1.4 cm, petiolules ± 1 mm, distal 2/3 to nearly whole margin incised 2/3–3/5+ to midvein, teeth (2–)3–4 per side, 3–5 mm, apical tufts 1–1.5 mm, abaxial surfaces grayish white to white, long hairs common to abundant, cottony(/crisped) hairs dense, short hairs and glands absent or obscured, adaxial grayish green to gray, long hairs abundant, 1–2 mm, soft (grading to cottony), short/crisped/cottony hairs common to abundant, glands sparse to common. |
Cauline leaves | 0–1. |
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Inflorescences | 1–3(–4)-flowered, open, branch angle 20–40°. |
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Pedicels | 1–1.5 cm, proximal to 3 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 lanceolate to ovate, 3–4 × 1–2 mm; hypanthium 2.5–3.5 mm diam.; sepals 3.5–5 mm, apex obtuse to subacute, glands sparse to common, often ± obscured; petals pale yellow, often overlapping, 5–7 × 5–8(–9) mm, distinctly longer than sepals; filaments 0.5–1.5 mm, anthers ± 0.5 mm; carpels 30–60, styles 0.8–0.9 mm. |
Achenes | 0.9–1.2 mm. |
1–1.3 mm. |
Potentilla newberryi |
Potentilla uschakovii |
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Phenology | Flowering summer. | Flowering summer. |
Habitat | Moist, sandy to clayey, more or less alkaline soil, especially where seasonally inundated near streams, ponds, and lakes | Dry tundra meadows, gravel and loam ridges, loam flats, sandy bluffs |
Elevation | 1300–1800 m (4300–5900 ft) | 0–200 m (0–700 ft) |
Distribution |
CA; NV; OR; WA
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NT; NU; Greenland; e Asia (Russian Far East) |
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.) |
For discussion of probable parentage and resultant diagnostic characters, see discussion of 89. Potentilla pedersenii. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 137. | FNA vol. 9, p. 211. |
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Arenicolae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Rubricaules |
Sibling taxa | ||
Synonyms | Ivesia gracilis | |
Name authority | A. Gray: Proc. Amer. Acad. Arts 6: 532. (1865) — not P. gracilis Douglas ex Hooker 1830 | Jurtzev: Bot. Zhurn. (Moscow & Leningrad) 73: 1613. (1988) |
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