Potentilla newberryi |
Potentilla sierrae-blancae |
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Newberry's cinquefoil |
Sierra blanca cinquefoil |
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Stems | 0.2–1 dm, lengths 1–1.5 times basal leaves. |
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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, 2–8 cm; petiole 0.5–5 cm, straight hairs sparse to abundant, sometimes absent, ± appressed, 2–3 mm, usually ± stiff, cottony hairs absent, glands absent; leaflets (3–)4–5, at tip of leaf axis, separate, proximal pair separated from others by 0(–1) mm of leaf axis, central leaflets narrowly cuneate-oblanceolate, 0.8–2.2 × 0.2–0.5 cm, petiolules 0(–1) mm, less than distal 1/4 of margins incised 1/2–3/4 to midvein, teeth 1(–2) per side, ± separate, 1–2 mm, surfaces similar, green, straight hairs mostly absent (except on margins), appressed, 1–2 mm, stiff, cottony hairs absent, glands absent, rarely sparse. |
Inflorescences | solitary flowers or 2–3-flowered. |
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Pedicels | 1–4 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 narrowly to widely elliptic-ovate, 2–3.5 × 1–1.5 mm; hypanthium 3–5 mm diam.; sepals 3–5 mm, apex obtuse to acute; petals 5–7 × 4–6 mm; filaments 1–2 mm, anthers 0.4–0.8 mm; carpels 5–20, styles 2 mm. |
Achenes | 0.9–1.2 mm. |
1.5 mm, smooth. |
Potentilla newberryi |
Potentilla sierrae-blancae |
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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 | Windswept barren ridges, subalpine grasslands, rock outcrops |
Elevation | 1300–1800 m (4300–5900 ft) | 2400–3700 m (7900–12100 ft) |
Distribution |
CA; NV; OR; WA
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NM |
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 sierrae-blancae is restricted to the White Mountains, Lincoln and Otero counties. P. A. Rydberg (1898, 1908d) and B. C. Johnston (1985) placed P. sierrae-blancae in sect. (or group) Aureae; the species fits well in sect. Concinnae, combining the few-flowered inflorescence of P. angelliae with the tridentate leaflets of P. bicrenata and P. johnstonii. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 137. | FNA vol. 9, p. 182. |
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Arenicolae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Concinnae |
Sibling taxa | ||
Synonyms | Ivesia gracilis | |
Name authority | A. Gray: Proc. Amer. Acad. Arts 6: 532. (1865) — not P. gracilis Douglas ex Hooker 1830 | Wooton & Rydberg: in P. A. Rydberg, Monogr. N. Amer. Potentilleae, 2: 57, plate 18, figs. 3–5. (1898) |
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