Potentilla newberryi |
Potentilla sterilis |
|
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Newberry's cinquefoil |
strawberry leaf cinquefoil or barren-strawberry, strawberryleaf cinquefoil |
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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. |
petiole 2–7(–17) cm, long hairs common to abundant, 1–2 mm; central leaflets (0.8–)1.5–3(–5) × (0.6–)1–2(–3) cm, straight hairs common to abundant (sparser adaxially), glands absent or sparse. |
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, 2.5–4 × 0.8–1.3 mm; sepals 4–6.5 mm, apex ± acute; petals 4–7 × 3–5 mm; filaments 0.8–2 mm, anthers 0.6–0.9 mm; carpels numerous. |
Achenes | 0.9–1.2 mm. |
1.5 mm. |
2n | = 28 (Europe). |
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Potentilla newberryi |
Potentilla sterilis |
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Phenology | Flowering summer. | Flowering spring. |
Habitat | Moist, sandy to clayey, more or less alkaline soil, especially where seasonally inundated near streams, ponds, and lakes | Dry to moist, often rocky slopes |
Elevation | 1300–1800 m (4300–5900 ft) | 0 m (0 ft) |
Distribution |
CA; NV; OR; WA
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NF; Europe [Introduced in North America] |
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 sterilis was collected from the coast of Newfoundland in 1928 (A. M. Ayre s.n., GH); no recent documentation of occurrence is known (J. Maunder, pers. comm. to L. Brouillet). Although previously treated as native (M. L. Fernald 1950; E. Hultén and M. Fries 1986), this status has been challenged (for example, A. Kurtto et al. in J. Jalas et al. 1972+, vol. 13). According to H. A. Gleason and A. Cronquist (1991), the species is also rarely introduced in the eastern United States; no vouchers have been seen. Potentilla sterilis is superficially similar to strawberry (Fragaria) but lacks the fleshy fruit; other differences include stolon structure, anther morphology, and style length and attachment. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 137. | FNA vol. 9, p. 132. |
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Arenicolae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Lupinoides |
Sibling taxa | ||
Synonyms | Ivesia gracilis | Fragaria sterilis |
Name authority | A. Gray: Proc. Amer. Acad. Arts 6: 532. (1865) — not P. gracilis Douglas ex Hooker 1830 | (Linnaeus) Garcke: Fl. N. Mitt.-Deutschland ed. 4, 112. (1858) |
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