Potentilla glaucophylla |
Potentilla bicrenata |
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blue-leaf cinquefoil, different-leaf cinquefoil, diverse-leaf cinquefoil, mountain meadow cinquefoil, vari-leaf cinquefoil |
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Glands | absent or inconspicuous, uncolored. |
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Stems | mostly ± ascending, 0.5–3(–4.5) dm. |
0.2–0.8(–1.5) dm, lengths 1/2–1 1/2 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. |
palmate, (2–)4–10(–15) cm; petiole (1–)2–6(–10) cm, straight hairs abundant, ± appressed to ascending, 1.5–2 mm, stiff, cottony hairs usually absent, glands sparse, often obscured; leaflets 5–7(–9), on tip or at least less than distal 1/10 of leaf axis, slightly overlapping, proximal pair separated from others by 0(–1) mm of leaf axis, central leaflets ± oblanceolate, 1–4(–5.5) × 0.5–1 cm, petiolules 0(–3) mm, less than distal 1/5(–1/3) of margins incised ± 1/2 to midvein, teeth 0–1(–3) per side, separate, 0.5–2 mm, surfaces strongly to ± dissimilar, abaxial grayish white to white, straight hairs abundant, ± appressed, 1–1.5(–2) mm, weak to stiff (especially on veins), cottony hairs common to dense, glands absent or obscured, adaxial green to grayish green, straight hairs ± abundant, appressed, 0.5–1 mm, stiff, cottony hairs absent, rarely sparse, glands absent or obscured. |
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Cauline leaves | (0–)1–2(–3). |
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Inflorescences | 2–10(–20)-flowered. |
2–5(–8)-flowered. |
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Pedicels | (0.5–)1–3(–6.5) cm. |
1–3(–4.5) cm. |
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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 ± lanceolate, 2–4 × 1 mm; hypanthium 3–4 mm diam.; sepals (2.5–)3–5.5 mm, apex ± acute; petals 3.5–7 × 2.5–5.5 mm; filaments 1–2 mm, anthers 0.5–1 mm; carpels 10–20, styles 2 mm. |
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Achenes | 1.2–1.6 mm. |
2 mm, smooth to rugose. |
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Potentilla glaucophylla |
Potentilla bicrenata |
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Phenology | Flowering early summer. | |||||
Habitat | Outcrops, dry flats, pine duff, in pine and/or juniper woodlands, sagebrush scrub | |||||
Elevation | 1900–3300 m (6200–10800 ft) | |||||
Distribution |
AK; CA; CO; ID; MT; NV; OR; UT; WA; WY; AB; BC; NL; NT; SK; YT
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AZ; CO; NM; UT; WY
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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.) |
The entire to tridentate leaflets of Potentilla bicrenata generally serve to distinguish this species from P. concinna. Unequivocal P. bicrenata is most common in Utah and the southern Rocky Mountains from New Mexico to central Colorado; in Arizona, it is documented only from the Kaibab Plateau. Wyoming populations tend to be transitional to P. concinna var. concinna in leaflet toothing and/or petal size. Some collections from as far north as Waterton Lakes National Park, Alberta, vary in the direction of P. bicrenata but are retained here in P. concinna. (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. 179. | ||||
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Graciles | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Concinnae | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. diversifolia var. glaucophylla | P. concinna var. bicrenata | ||||
Name authority | Lehmann: Index Seminum (Hamburg) 1836: 7. (1836) | Rydberg: Bull. Torrey Bot. Club 23: 431. (1896) | ||||
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