Potentilla newberryi |
Potentilla multijuga |
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Newberry's cinquefoil |
Ballona cinquefoil, lost cinquefoil |
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Habit | Plants ± rosetted; taproots ± fleshy-thickened. | |
Stems | prostrate to ascending, 2–5(–7) 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. |
pinnate with distal leaflets ± confluent, 10–22 × 1.5–3.5 cm; petiole (2–)4–10 cm, straight hairs absent or sparse, appressed, 0.5–1.5 mm, stiff, cottony hairs absent, glands absent; primary lateral leaflets 3–8 per side, on distal 1/3–2/3 of leaf axis, ± separate, largest ones cuneate to obovate, 1–2.2 × 0.8–1.5 cm, distal 1/3–2/3 of margin ± evenly incised ± 1/2 to midvein, ultimate teeth 3–6, ± ovate, 2–6 × 1.5–3 mm, apical tufts absent, surfaces green, not glaucous, straight hairs sparse to nearly absent (except on margins), ± appressed, 0.5–1 mm, stiff, cottony hairs absent, glands absent or sparse. |
Cauline leaves | 1–3. |
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Inflorescences | 3–10(–20)-flowered, very openly cymose, sometimes racemiform. |
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Pedicels | 1.5–3.5(–5) cm, ± recurved 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 ovate-elliptic, 2.5–4(–5) × 1.5–3 mm, sometimes toothed; hypanthium 4–6 mm diam.; sepals 4–6(–7) mm, apex acute, rarely acuminate; petals 4.5–10 × 4–10 mm; filaments 1.5–3(–4.5) mm, anthers 0.7–1 mm; carpels 5–10, styles 2–3 mm. |
Achenes | 0.9–1.2 mm. |
1.8–2 mm, smooth to faintly rugose, possibly carunculate. |
Potentilla newberryi |
Potentilla multijuga |
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Phenology | Flowering summer. | Flowering spring–early summer. |
Habitat | Moist, sandy to clayey, more or less alkaline soil, especially where seasonally inundated near streams, ponds, and lakes | Brackish coastal meadows or marshes |
Elevation | 1300–1800 m (4300–5900 ft) | 0–10 m (0–0 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.) |
Of conservation concern. Potentilla multijuga is known only from a handful of collections made in the 1890s near the current site of Los Angeles International Airport. All efforts to locate extant plants have failed; the species is presumed extinct. Continued use of P. multijuga for this species required conservation of the name with a conserved type, because the type designated by Lehmann is a specimen of Horkelia cuneata Lindley var. cuneata (B. Ertter and J. L. Reveal 2008). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 137. | FNA vol. 9, p. 175. |
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Arenicolae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Multijugae |
Sibling taxa | ||
Synonyms | Ivesia gracilis | |
Name authority | A. Gray: Proc. Amer. Acad. Arts 6: 532. (1865) — not P. gracilis Douglas ex Hooker 1830 | Lehmann: Index Seminum (Hamburg) 1849: 6. (1849) |
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