Potentilla versicolor |
Potentilla sanguinea |
|
---|---|---|
Steens Mountain cinquefoil, varying cinquefoil |
Flagstaff cinquefoil |
|
Habit | Plants rosetted to ± matted; taproots ± fleshy-thickened. | |
Stems | prostrate to ascending, (0.7–)1.5–2.5(–4) dm, lengths 2–4(–5) times basal leaves. |
3–7(–10) dm. |
Basal leaves | pinnate with distal leaflets ± confluent, 4–12 × 1–2.5(–3.5) cm; petiole 1–3 cm, straight hairs absent (on early-season petioles) or sparse to common, spreading-ascending to loosely appressed, 1–2 mm, soft, cottony hairs usually absent, glands sparse; primary lateral leaflets 3–5 per side, on distal (1/3–)1/2–2/3 of leaf axis, overlapping, largest ones cuneate to flabellate, 0.5–1.5(–2) × 0.5–1.5 cm, distal 3/4 to whole margin unevenly incised 2/3 to completely to midvein (blade often medially split as well), ultimate teeth or segments 2–5(–8), ± oblanceolate, 3–11 × 1–3 mm, apical tufts to 1 mm, surfaces green to grayish green, not glaucous, straight hairs sparse to common (sparser adaxially), sometimes absent (except on margins), loosely appressed to ascending, 1–2 mm, soft, cottony hairs absent, glands sparse to common. |
± 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 | 1–2(–3). |
stipules usually entire. |
Inflorescences | (1–)3–10-flowered, usually openly cymose. |
(4–)8–40(–70)-flowered. |
Pedicels | 1–3(–5) cm, straight to slightly recurved in fruit. |
0.3–2 cm. |
Flowers | epicalyx bractlets lanceolate to elliptic, rarely ovate, 2–5 × 1–2 mm, sometimes apically toothed; hypanthium 3–5 mm diam.; sepals 4–7 mm, apex acute; petals 4–7 × 3–5.5 mm; filaments (1–)1.5–2.5 mm, anthers 0.5–0.8 mm; carpels 10–25, styles 2 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 | 1.5–1.8 mm, smooth to faintly rugose, not carunculate. |
1.5–2 mm, lightly rugose. |
Potentilla versicolor |
Potentilla sanguinea |
|
Phenology | Flowering summer. | Flowering summer. |
Habitat | Rocky, alpine meadows, seasonally moist slopes, near streams or snowmelt | Moist forest settings in oak and conifer woodlands |
Elevation | 2100–3200 m (6900–10500 ft) | 2100–2200 m (6900–7200 ft) |
Distribution |
NV; OR
|
AZ |
Discussion | Potentilla versicolor is most common on Steens Mountain in Harney County, Oregon. Collections are known from other mountain ranges in eastern Oregon (some possibly representing distinct taxa) and from near Island Lake in the Ruby Mountains of northeastern Nevada. The species often grows and, apparently, intergrades with P. breweri; it is usually distinct in its lack of cottony hairs. Petals, filaments, and styles tend to be somewhat shorter in P. versicolor than in P. breweri. Collections of P. versicolor have most often been identified as P. breweri, P. millefolia, or P. ovina. (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. 171. | FNA vol. 9, p. 149. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | P. thurberi var. sanguinea | |
Name authority | Rydberg: in N. L. Britton et al., N. Amer. Fl. 22: 344. (1908) | Rydberg: in N. L. Britton et al., N. Amer. Fl. 22: 324. (1908) |
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