Potentilla newberryi |
Potentilla anachoretica |
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Newberry's cinquefoil |
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Stems | erect, 1–3 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. |
pinnate, (4–)5–10(–14) cm; petiole 3–7(–10) cm, long hairs abundant, subappresssed to appressed, 0.5–2 mm, ± weak, short hairs absent, crisped or cottony hairs absent or sparse, glands absent or sparse; leaflets 2–3 per side, on distal 1/3–1/2 of leaf axis, separate, terminal ones elliptic to obovate, (1.8–)2–2.5(–3) × 0.8–1.3 cm, margins revolute, incised nearly to midvein, undivided medial blade 1–2 mm wide, teeth (4–)5–7 per side, linear, surfaces ± dissimilar, abaxial grayish to white, long hairs ± abundant especially on veins, 1–1.5 mm, weak, short hairs absent, crisped hairs abundant to dense, glands absent or obscured, adaxial greenish gray, long hairs common, appressed, 0.5–1 mm, short hairs absent, crisped hairs absent or sparse, glands absent or obscured. |
Cauline leaves | 1–2. |
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Inflorescences | 2–5-flowered, very open. |
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Pedicels | 2–4 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 elliptic to linear, 3–4 × 0.5–0.8(–1) mm, lengths 2/3–3/4 times sepals, margins flat; hypanthium 2.5–3 mm diam.; sepals 3.5–5 mm, apex subacute, abaxial surfaces: venation indistinct, glands sparse to common, often obscured; petals yellow, 7.5–10(–10.5) × 7.5–9(–10) mm, much exceeding sepals; filaments 1–2 mm, anthers 0.5–0.7 mm; carpels 50–60, styles papillate-swollen at very base, if at all, 0.8–0.9 mm. |
Achenes | 0.9–1.2 mm. |
1.4–1.6 mm, smooth to faintly rugose. |
2n | = 28 (14, 42, 56) (Russian Far East). |
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Potentilla newberryi |
Potentilla anachoretica |
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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 ridges, rocky outcrops, south-facing slopes, mainly on basic substrates |
Elevation | 1300–1800 m (4300–5900 ft) | 500 m (1600 ft) |
Distribution |
CA; NV; OR; WA
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AK; 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.) |
Potentilla anachoretica is isolated in sect. Pensylvanicae. B. A. Jurtzev (1993, pers. comm.) claimed indirect support for the presence of P. anachoretica in Alaska and Yukon by the presence of three hybrid species presumably involving P. anachoretica in their parentage: P. borealis Soják, P. murrayi Jurtzev, and P. petrovskyi Soják (sect. Rubricaules; discussed by B. Ertter et al. 2013). Potentilla anachoretica is confirmed from at least two sites in Brooks Range, northern Alaska. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 137. | FNA vol. 9, p. 218. |
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Arenicolae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Pensylvanicae |
Sibling taxa | ||
Synonyms | Ivesia gracilis | |
Name authority | A. Gray: Proc. Amer. Acad. Arts 6: 532. (1865) — not P. gracilis Douglas ex Hooker 1830 | Soják: Preslia 46: 70, fig. [p. 71]. (1974) |
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