Potentilla flabellifolia |
Potentilla rubella |
|
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fan-foil, fan-leaf cinquefoil, fanleaf or fanfoil or Mount Rainier cinquefoil, fringe-leaf cinquefoil, high mountain cinquefoil |
reddish cinquefoil |
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Habit | Plants ± openly matted; caudex branches short to elongate, ± stout. | |
Glands | sparse to abundant, red, stipitate (at least on calyx and hypanthium). |
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Stems | ascending to erect, (0.3–)1–3 dm, lengths 2 times basal leaves. |
0.5–2 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. |
3–6 cm; petiole 2–4 cm, hairs common to abundant, ± ascending to spreading, 1–1.5 mm, weak to stiff, glands sparse to common; leaflets (4–)5(–6), central one obovate, 0.5–1.5 × 0.3–0.9 cm, distal ca. 1/2 of margin incised ca. 1/4 to midvein, teeth (2–)3(–4) per side, surfaces ± similar, abaxial pale reddish green, hairs sparse to common on primary veins, spreading, 0.6–1 mm, ± stiff, adaxial green or reddish, glabrous or sparsely hairy. |
Cauline leaves | 1–2; stipules fused with all or most of petiole, free portion shorter than fused portion. |
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Inflorescences | 1–6-flowered. |
(1–)2–5-flowered. |
Pedicels | straight, 0.3–4.5(–5) cm, not much longer in fruit than in flower. |
1–3 cm (proximalmost to 5 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 linear to narrowly lanceolate, 4–6 × 0.9–1.2 mm; hypanthium 3–4 mm diam.; sepals 5–7 mm, apex subacute or acute; petals 7–9 × 4–6 mm; filaments 0.7–0.9 mm, anthers 0.4 mm; carpels 40–50, styles 0.9–1.1 mm. |
Achenes | 1.2–1.5 mm. |
not known. |
2n | = 28. |
= 28, 42 (Siberia). |
Potentilla flabellifolia |
Potentilla rubella |
|
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 | Herb-Salix meadows, herb slopes, open tundra, among mosses |
Elevation | 1000–3700 m (3300–12100 ft) | 0–500 m (0–1600 ft) |
Distribution |
CA; ID; MT; NV; OR; WA; WY; AB; BC
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Greenland; Asia |
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.) |
Potentilla rubella combines characteristics of P. hyparctica (sect. Aureae) and P. stipularis. The species is strongly supported as an intersectional hybrid with polytopic origins. It reproduces by seed, shows no transitions to its presumed parental species, and has significant ranges in eastern and northeastern Greenland and northern Asia. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 190. | FNA vol. 9, p. 147. |
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Aureae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Chrysanthae |
Sibling taxa | ||
Synonyms | P. rubelloides | |
Name authority | Hooker ex Torrey & A. Gray: Fl. N. Amer. 1: 442. (1840) | T. J. Sørensen: Meddel. Grønland 101(2): 106, plates 1–3. (1934) |
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