Potentilla wheeleri |
Potentilla stipularis |
|
---|---|---|
Kern cinquefoil, Wheeler's cinquefoil |
stipulate cinquefoil, stipulated cinquefoil |
|
Glands | mostly absent. |
|
Stems | 0.2–2.5 dm. |
(0.2–)1–2.5(–3.5) dm. |
Basal leaves | palmate, 1.5–9.5 cm; petiole 1–7 cm, long hairs abundant to dense, spreading to appressed, 1–2 mm, weak to stiff, glands ± abundant; leaflets 5, central cuneate-elliptic to obovate, 0.5–2.5 × 0.3–1.5 cm, scarcely to distinctly petiolulate, distal 1/3 of margins evenly incised ± 1/4 to midvein, teeth 2–4(–5) per side, surfaces gray-green, long hairs abundant to dense, 1–1.5 mm, glands ± abundant, sometimes obscured. |
3–7(–10) cm; petiole 2–5(–7.5) cm, hairs absent or sparse, appressed to spreading, 0.5–0.8 mm, stiff, glands absent or nearly so; leaflets 7–11, central one oblanceolate-elliptic, 1–2(–3) × 0.3–0.8 cm, distal 1/4 or less of margin incised less than 1/10(–1/4) to midvein, teeth 1–2(–5) per side, surfaces similar, abaxial pale green to reddish, often glaucous, hairs absent or sparse to common on primary veins, appressed to ascending, 0.6–1 mm, stiff, adaxial green or reddish, glabrous or nearly so. |
Cauline leaves | 1–3; stipules fused with all or most of petiole, free portion shorter than fused portion. |
|
Inflorescences | 1–20-flowered. |
2–5-flowered. |
Pedicels | 0.5–1.5 cm. |
1–3 cm (proximalmost to 6 cm). |
Flowers | epicalyx bractlets lanceolate to ovate-elliptic, 1–3.5 × 1–1.5 mm; hypanthium 2–4 mm diam.; sepals 2–5 mm, apex ± acute; petals ± paler abaxially, bright yellow adaxially, ± obcordate, 3–6 × 2–5 mm; filaments 1–2 mm, anthers 0.5 mm; carpels ca. 20, styles (1.2–)1.5–2 mm. |
epicalyx bractlets lanceolate to narrowly lanceolate, 3–5 × 0.7–1(–1.5) mm; hypanthium 2.5–3 mm diam.; sepals 4–6 mm, apex acute; petals (4–)6–8 × 4–6 mm; filaments 1.6–2 mm, anthers 0.4–0.6 mm; carpels 40–50, styles 0.7–0.9 mm. |
Achenes | 1–1.5 mm, lightly rugose. |
1.1–1.3 mm, smooth. |
Short | hairs not well differentiated from long hairs, absent or sparse throughout. |
|
2n | = 28 (Eurasia). |
|
Potentilla wheeleri |
Potentilla stipularis |
|
Phenology | Flowering May–Sep. | Flowering summer. |
Habitat | Sandy flats, streamsides, lake margins, open conifer woodlands, alpine fellfields | Herb meadows, alluvial meadows and flats, open shrub thickets, Salix-Dryas tundra |
Elevation | 1800–3500 m (5900–11500 ft) | 10–600 m (0–2000 ft) |
Distribution |
CA
|
AK; Greenland; Eurasia |
Discussion | Potentilla wheeleri is found in the southern Sierra Nevada and San Bernardino Mountains of southern California. Compact plants on the summit of Mount San Gorgonio, described by Jepson as var. paupercula, show no consistent difference to justify their taxonomic segregation. Variety viscidula Rydberg has been misapplied to Arizona populations now called P. rhyolitica. Plants identified as P. wheeleri (excluding P. rimicola) from the Sierra San Pedro Mártir (Baja California) stand as a distinct species, P. luteosericea Rydberg (= P. pinetorum Wiggins). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
The occurrences of Potentilla stipularis in Alaska are a continuation of the range from Asia. The six known occurrences in eastern and northeastern Greenland are disjunct (A. E. Porsild 1964) and were assigned to var. groenlandica by Sørensen, differing from Asian and Alaskan counterparts mainly in quantitative features: 9–11 leaflets, 7–11 teeth per leaflet, and not conspicuously glaucous (G. Halliday, pers. comm.). Here var. groenlandica is considered a high-arctic ecotype that provisionally is not accepted taxonomically. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 185. | FNA vol. 9, p. 147. |
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Subviscosae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Chrysanthae |
Sibling taxa | ||
Synonyms | P. wheeleri var. paupercula | P. stipularis var. groenlandica |
Name authority | S. Watson: Proc. Amer. Acad. Arts 11: 148. (1876) | Linnaeus: Sp. Pl. 1: 498. (1753) |
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