Potentilla wheeleri |
Potentilla rubella |
|
---|---|---|
Kern cinquefoil, Wheeler's cinquefoil |
reddish cinquefoil |
|
Glands | sparse to abundant, red, stipitate (at least on calyx and hypanthium). |
|
Stems | 0.2–2.5 dm. |
0.5–2 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. |
3–6 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. |
|
Inflorescences | 1–20-flowered. |
(1–)2–5-flowered. |
Pedicels | 0.5–1.5 cm. |
1–3 cm (proximalmost to 5 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 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 | 1–1.5 mm, lightly rugose. |
not known. |
Short | hairs not well differentiated from long hairs, absent or sparse throughout. |
|
2n | = 28, 42 (Siberia). |
|
Potentilla wheeleri |
Potentilla rubella |
|
Phenology | Flowering May–Sep. | Flowering summer. |
Habitat | Sandy flats, streamsides, lake margins, open conifer woodlands, alpine fellfields | Herb-Salix meadows, herb slopes, open tundra, among mosses |
Elevation | 1800–3500 m (5900–11500 ft) | 0–500 m (0–1600 ft) |
Distribution |
CA
|
Greenland; Asia |
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.) |
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. 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. rubelloides |
Name authority | S. Watson: Proc. Amer. Acad. Arts 11: 148. (1876) | T. J. Sørensen: Meddel. Grønland 101(2): 106, plates 1–3. (1934) |
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