Potentilla glaucophylla |
Potentilla arizonica |
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blue-leaf cinquefoil, different-leaf cinquefoil, diverse-leaf cinquefoil, mountain meadow cinquefoil, vari-leaf cinquefoil |
Garland prairie cinquefoil |
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Habit | Plants rosetted to tufted; taproots ± fleshy-thickened. | |||||
Glands | absent or inconspicuous, uncolored. |
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Stems | mostly ± ascending, 0.5–3(–4.5) dm. |
decumbent to ascending, sometimes prostrate, 0.6–2.2 dm, lengths 1.5–3 times basal leaves. |
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Basal leaves | often 2-ranked, palmate, sometimes subpalmate, 2–20 cm; petiole (0.5–)1–8(–14) cm, long hairs often absent, sometimes sparse to abundant, usually appressed, 1–2 mm, weak to ± stiff, short, crisped, and cottony hairs absent, glands absent or sparse; leaflets 5–6(–7), sometimes with 1–2(–4) additional, smaller, entire leaflets, on tip or to distal 1/10(–1/4) of leaf axis, separate, largest ones oblanceolate or cuneate to obovate, 1–4(–6) × 0.5–1.5(–2) cm, margins flat, distal 1/3–1/2(–2/3) ± evenly incised 1/2 or nearly to midvein, undivided medial blade 1.5–7(–10) mm wide, teeth 1–3(–5) per side, broadly lanceolate or linear to narrowly oblong, 1–5(–8) mm, surfaces similar adaxial ± less hairy, ± blue-green, usually glaucous, long hairs sparse to abundant (often restricted to veins, distal teeth, and margins), short, crisped, and cottony hairs absent, glands absent or sparse. |
pinnate with distal leaflets ± distinct, 4–10 × 1–2(–3) cm; petiole 1–3 cm, straight hairs dense, ± appressed, 1–2 mm, stiff, cottony hairs absent, glands absent or sparse; primary lateral leaflets 5–7(–9) per side (sometimes with additional interspersed leaflets), on distal (1/2–)2/3–3/4 of leaf axis, ± overlapping, largest ones oblanceolate- to obovate-oblong, 0.5–1.5 × 0.4–0.8 cm, distal 3/4 to whole margin pinnately incised nearly to midvein, teeth (5–)7–9, linear-oblanceolate, 2–6 × 0.5–1 mm, apical tufts 1 mm, surfaces grayish green, straight hairs sparse (adaxially) to common, ± appressed, 1–2 mm, stiff, cottony hairs absent, glands absent or obscured. |
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Cauline leaves | (0–)1–2(–3). |
(1–)2–3(–4). |
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Inflorescences | 2–10(–20)-flowered. |
3–15-flowered, ± compactly cymose, opening in fruit. |
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Pedicels | (0.5–)1–3(–6.5) cm. |
0.7–2(–2.5) cm, straight in fruit. |
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Flowers | epicalyx bractlets lanceolate to elliptic, 2–5 × 0.8–1.2(–1.6) mm, hairs sparse to common, rarely abundant, ± ascending, glands absent or inconspicuous; hypanthium 3.5–5 mm diam.; sepals (2–)2.5–4.5(–5) mm, apex acute to short acuminate; petals (4–)5–10(–12) × 4–9(–10) mm; filaments 1.5–2.5(–3) mm, anthers 0.4–0.7(–0.9) mm; carpels 25–40, styles filiform above papillate-swollen base, 1.5–2.5(–3) mm. |
epicalyx bractlets narrowly elliptic, sometimes doubled, 2–3.5 × 1–1.5 mm; hypanthium 3–4 mm diam.; sepals 4–6 mm, apex ± acute; petals 4–5(–6) × 3–4(–5.5) mm; filaments 1–2 mm, anthers 1–1.5 mm, often as long as filaments; carpels 8–20, styles 2 mm. |
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Achenes | 1.2–1.6 mm. |
1.8 mm, ± smooth, not carunculate. |
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Potentilla glaucophylla |
Potentilla arizonica |
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Phenology | Flowering late spring–early summer. | |||||
Habitat | Vernally wet clay of rocky basaltic meadows, openings in pine woodlands | |||||
Elevation | 1900–2100 m (6200–6900 ft) | |||||
Distribution |
AK; CA; CO; ID; MT; NV; OR; UT; WA; WY; AB; BC; NL; NT; SK; YT
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AZ |
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Discussion | Varieties 2 (2 in the flora). Potentilla glaucophylla replaces P. diversifolia; an examination of the lectotype of the latter confirms J. Soják’s (1996) conclusion that P. diversifolia applies to a hybrid involving P. glaucophylla and P. hippiana. Historically, this species was often termed P. dissecta Pursh, a misapplied name that has been rejected (B. Ertter et al. 2008). In addition to the nomenclatural change, the circumscription of Potentilla glaucophylla is here restricted to plants with usually glaucous, blue-green, distally toothed leaflets that are usually glabrate (at least in var. glaucophylla). Plants from the Colorado Plateau and southern Rocky Mountains formerly included in this species and having dark green leaves, more leaflet teeth, and larger anthers are transferred either to P. townsendii or to a currently undescribed entity. The two-ranked leaves of Potentilla glaucophylla suggest a possible connection to P. crantzii in sect. Aureae. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Potentilla arizonica is known only from the Garland Prairie area in Coconino County. Although commonly included within P. plattensis (for example, N. H. Holmgren 1997b; B. C. Johnston 1980; T. H. Kearney and R. H. Peebles 1951), P. arizonica differs in its longer hairs, more erect habit, more condensed inflorescences, pedicels that remain straight in fruit, and significantly larger anthers. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 9, p. 152. | FNA vol. 9, p. 170. | ||||
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Graciles | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Multijugae | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. diversifolia var. glaucophylla | Ivesia pinnatifida | ||||
Name authority | Lehmann: Index Seminum (Hamburg) 1836: 7. (1836) | Greene: Pittonia 1: 104. (1887) — not Potentilla pinnatifida C. Presl 1822 | ||||
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