Potentilla newberryi |
Potentilla rimicola |
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Newberry's cinquefoil |
cliff cinquefoil |
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Stems | 0.4–2(–3) 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. |
palmate, 3–10 cm; petiole 1–7 cm, long hairs abundant, spreading to ascending, 1–3 mm, weak, glands abundant; leaflets 5, central oblanceolate to broadly obovate-cuneate or nearly orbiculate, 1–3 × 0.8–2 cm, scarcely to distinctly petiolulate, distal ± 1/3 of margins evenly incised ± 1/4 to midvein, teeth 2–4 per side, surfaces green, long hairs sparse to abundant, 1 mm, glands ± abundant. |
Inflorescences | 3–20-flowered. |
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Pedicels | 0.5–2.5(–4) 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-elliptic, rarely linear, 1–2(–5) × 0.5–1.5 mm; hypanthium 2–3.5 mm diam.; sepals 2–4(–5) mm, apex ± acute; petals ± paler abaxially, bright yellow adaxially, ± obcordate, (3–)4–7 × 3–6 mm; filaments 1.5–2.5 mm, anthers 0.5–1 mm; carpels 5–20, styles 1.5–2.5 mm. |
Achenes | 0.9–1.2 mm. |
1.5 mm, smooth to faintly rugose. |
Short | hairs not well differentiated from long hairs, absent or sparse throughout. |
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Potentilla newberryi |
Potentilla rimicola |
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Phenology | Flowering summer. | Flowering May–Sep. |
Habitat | Moist, sandy to clayey, more or less alkaline soil, especially where seasonally inundated near streams, ponds, and lakes | Crevices on protected faces of granitic outcrops in conifer woodlands |
Elevation | 1300–1800 m (4300–5900 ft) | 2400–2900 m (7900–9500 ft) |
Distribution |
CA; NV; OR; WA
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CA; Mexico (Baja California) |
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.) |
Of conservation concern. Potentilla rimicola is known only from Tahquitz Peak in the San Jacinto Mountains, Riverside County, California, and the Sierra San Pedro Mártir in Baja California, Mexico. Plants are rooted in rock crevices, often on vertical surfaces, in contrast to P. wheeleri, which is rooted in the ground. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 137. | FNA vol. 9, p. 185. |
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Arenicolae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Subviscosae |
Sibling taxa | ||
Synonyms | Ivesia gracilis | P. wheeleri var. rimicola |
Name authority | A. Gray: Proc. Amer. Acad. Arts 6: 532. (1865) — not P. gracilis Douglas ex Hooker 1830 | (Munz & I. M. Johnston) Ertter: Phytologia 71: 420. (1992) |
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