Potentilla newberryi |
Potentilla grayi |
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Newberry's cinquefoil |
Gray's cinquefoil |
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Habit | Plants rosetted or ± tufted; caudex branches absent or short to elongate, stout to slender. | |
Stems | ascending to erect, (0.4–)1–2 dm, lengths 2–4 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–)2–5(–7) cm; stipules: apex acute to rounded; petiole 1–4 cm, hairs absent or long hairs sparse to common, appressed, 0.5–1 mm, stiff, glands absent; leaflets 3, central obovate to flabellate, 1–2.5 × 0.5–2 cm, petiolule (1–)3–10 mm, margins flat, not lobed, distal 1/2–3/4 ± evenly incised 1/4–1/2 to midvein, teeth (2–)3(–4) per side, not secondarily toothed, surfaces similar, green, sometimes ±glaucous, hairs absent or sparse to common, 0.5 mm, glands absent. |
Inflorescences | 1–6-flowered. |
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Pedicels | straight, 0.5–2 cm in flower, to 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 elliptic to oval, 2–4.5 × 1–2 mm, margins flat; hypanthium 2.5–4 mm diam.; sepals 3–5.5 mm, apex acute to obtuse; petals yellow, 4–7 × 4–6 mm; filaments 1–3 mm, anthers 0.5–0.9 mm; carpels 10–30, styles filiform, not or slightly papillate-swollen proximally, 1–2.5 mm. |
Achenes | 0.9–1.2 mm. |
1.2–1.5 mm. |
Potentilla newberryi |
Potentilla grayi |
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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 | Moist stream banks, lakeshores, meadows, in conifer woodlands |
Elevation | 1300–1800 m (4300–5900 ft) | 2000–2800 m (6600–9200 ft) |
Distribution |
CA; NV; OR; WA
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CA |
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 grayi occurs on the western slope of the Sierra Nevada from El Dorado County to Tulare County, well within the range of P. flabellifolia. Some collections are intermediate between the two. Potentilla grayi can be distinguished by its tendency to have glabrous or strigose leaves, distinctly petiolulate leaflets with simple teeth, paler yellow petals, and a less-branched caudex. The report of Potentilla grayi in New Mexico (J. D. Garcia 1970) was based on a specimen of P. norvegica (sect. Rivales). (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 | P. flabellifolia var. grayi |
Name authority | A. Gray: Proc. Amer. Acad. Arts 6: 532. (1865) — not P. gracilis Douglas ex Hooker 1830 | S. Watson: Proc. Amer. Acad. Arts 8: 560. (1873) |
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