Potentilla flabellifolia |
Potentilla sanguinea |
|
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fan-foil, fan-leaf cinquefoil, fanleaf or fanfoil or Mount Rainier cinquefoil, fringe-leaf cinquefoil, high mountain cinquefoil |
Flagstaff cinquefoil |
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Habit | Plants ± openly matted; caudex branches short to elongate, ± stout. | |
Stems | ascending to erect, (0.3–)1–3 dm, lengths 2 times basal leaves. |
3–7(–10) dm. |
Basal leaves | 2-ranked, ternate, (1–)3–12(–20) cm; stipules: apex rounded; petiole (0.5–)1–15(–18) cm, hairs and glands usually absent; leaflets 3, central widely obovate to flabellate, (0.5–)1–5 × (0.4–)1–3(–3.5) cm, petiolule 0–5(–10) mm, margins flat, not or shallowly lobed (sinuses extending less than 1/2 to midvein), distal 1/2–3/4 usually unevenly incised 1/4–1/2 to midvein, teeth 3–7 per side, often secondarily toothed, surfaces similar, green, hairs absent or sparse, rarely common, 0.5–1 mm, glands absent or sparse. |
± subpalmate, sometimes palmate, (4–)6–15(–21) cm; petiole (2–)4–10(–15) cm, long hairs sparse to abundant, spreading to weakly appressed, 0.5–2(–3) mm, weak to ± stiff, glands sparse to abundant; leaflets (5–)7, on less than distal 1/10 (1–5[–10] mm) of leaf axis, central one 1–6(–7) × 1–2(–3) cm, petiolules 0(–6) mm, distal 1/2–3/4 (sometimes nearly whole), margin incised 1/5 or less to midvein, teeth 4–10(–15) per side, 1–2(–3) mm, teeth apex ± obtuse, surfaces ± similar, abaxial green, straight hairs sparse to abundant, especially on veins, 0.5–1.5 mm, cottony hairs absent, glands ± sparse or absent, adaxial slightly paler green, hairs shorter and sparser. |
Cauline leaves | stipules usually entire. |
|
Inflorescences | 1–6-flowered. |
(4–)8–40(–70)-flowered. |
Pedicels | straight, 0.3–4.5(–5) cm, not much longer in fruit than in flower. |
0.3–2 cm. |
Flowers | epicalyx bractlets often toothed or 2-lobed, elliptic to oval, 3.5–7 × (1–)1.5–3 mm, margins flat; hypanthium 3–7 mm diam.; sepals 4–8 mm, apex acute to obtuse; petals dark yellow, (5–)6–10(–12) × (3–)5–10 mm; filaments 1.5–3 mm, anthers 0.6–1.5 mm; carpels 20–50, styles filiform, not or slightly papillate-swollen proximally, 1.6–2.5 mm. |
epicalyx bractlets lanceolate-elliptic, 3.5–8 × 1–1.5(–2) mm; sepals 4–8(–10) mm, apex acuminate; petals dark reddish proximally, reddish orange distally, (3.5–)5–9 × 5–10 mm; filaments 1.5–2.5 mm, anthers 0.8 mm; carpels 30–40, styles 2–3 mm. |
Achenes | 1.2–1.5 mm. |
1.5–2 mm, lightly rugose. |
2n | = 28. |
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Potentilla flabellifolia |
Potentilla sanguinea |
|
Phenology | Flowering summer. | Flowering summer. |
Habitat | Moist to wet or swampy, sometimes dry, stream banks, lakeshores, meadows, in conifer woodlands, subalpine and alpine grassy, rocky slopes, near or above timberline | Moist forest settings in oak and conifer woodlands |
Elevation | 1000–3700 m (3300–12100 ft) | 2100–2200 m (6900–7200 ft) |
Distribution |
CA; ID; MT; NV; OR; WA; WY; AB; BC
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AZ |
Discussion | Potentilla flabellifolia is found in the mountains from southern British Columbia, southwestern Alberta, and southwestern Montana to the southern Sierra Nevada of California. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Potentilla sanguinea is known only from south and east of Flagstaff, Coconino County. The species may be a hybrid between P. thurberi var. thurberi and P. hippiana or another member of sect. Leucophyllae that occurs sympatrically. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 190. | FNA vol. 9, p. 149. |
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Aureae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Rubrae |
Sibling taxa | ||
Synonyms | P. thurberi var. sanguinea | |
Name authority | Hooker ex Torrey & A. Gray: Fl. N. Amer. 1: 442. (1840) | Rydberg: in N. L. Britton et al., N. Amer. Fl. 22: 324. (1908) |
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