Potentilla newberryi |
Potentilla fragiformis |
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Newberry's cinquefoil |
strawberry cinquefoil |
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Habit | Plants tufted to cushion-forming; caudex branches short, stout, diam. 1–1.5(–2) cm, including old leaf bases. | |
Stems | ascending to erect, 0.3–1.5(–2) dm, lengths 1–2 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. |
not in ranks, ternate, (1–)4–10(–15) cm; stipules: apex acute to obtuse; petiole (0.3–)2–11(–13) cm, long hairs abundant, ascending to spreading, 1–2.3 mm, soft, glands sparse to common; leaflets 3, central obovate, 0.7–2.5 × 0.5–1.6 cm, petiolule 0–1 mm, margins revolute, not lobed, distal 1/2–2/3 evenly incised ± 1/3 to midvein, teeth 2–3(–4) per side, surfaces ± similar, green (paler abaxially), hairs common, 1–1.5 mm, glands common (sparser adaxially). |
Inflorescences | 1–3-flowered. |
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Pedicels | straight, 0.5–2 cm in flower, to 3.5 cm in fruit. |
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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 oblong, 3–7 × 1.2–2.5 mm, margins revolute; hypanthium 4–6 mm diam.; sepals 4–6(–7) mm, apex broadly acute to obtuse; petals yellow, 9–12 × 8–10 mm; filaments (2–)2.8–3.2 mm, anthers 0.5–0.8 mm; carpels 40–50, styles filiform, not or scarcely papillate-swollen proximally, 1.7–2 mm. |
Achenes | 0.9–1.2 mm. |
1.3–1.5. |
2n | = 42, 56 (Russian Far East). |
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Potentilla newberryi |
Potentilla fragiformis |
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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 | Leymus-Potentilla sand dunes, coastal gravel bars, beach ridges |
Elevation | 1300–1800 m (4300–5900 ft) | 0–10 m (0–0 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.) |
Recent collections of Potentilla fragiformis in Alaska on the coast of the Bering and Chukchi seas have confirmed historical reports (P. A. Rydberg 1908d) of this Beringian species in North America. Dwarf plants from St. Lawrence Island are somewhat intermediate to P. nana but have the larger petals and longer styles of P. fragiformis. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 137. | FNA vol. 9, p. 191. |
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Arenicolae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Aureae |
Sibling taxa | ||
Synonyms | Ivesia gracilis | |
Name authority | A. Gray: Proc. Amer. Acad. Arts 6: 532. (1865) — not P. gracilis Douglas ex Hooker 1830 | D. F. K. Schlechtendal: Ges. Naturf. Freunde Berlin Mag. Neuesten Entdeck. Gesammten Naturk. 7: 294. (1816) |
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