Potentilla wheeleri |
Potentilla demotica |
|
---|---|---|
Kern cinquefoil, Wheeler's cinquefoil |
Hualapai cinquefoil |
|
Stems | 0.2–2.5 dm. |
0.2–1.5(–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. |
usually palmate, sometimes ternate, 2–8 cm; petiole 1–7 cm, long hairs common, spreading to ascending, 1.5–2.5 mm, weak to ± stiff, glands abundant; leaflets (3–)5, central oblanceolate, 0.5–1.5(–2) × 0.4–0.8 cm, scarcely petiolulate, distal ± 3/4 of margins ± evenly incised 1/2–3/4 to midvein, teeth 2–3(–4) per side, surfaces green, long hairs sparse to common, 0.5–1.5 mm, glands abundant. |
Inflorescences | 1–20-flowered. |
1–7-flowered. |
Pedicels | 0.5–1.5 cm. |
0.5–1(–2) 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 ovate-elliptic, 1–2.5 × 1–1.5 mm; hypanthium 2–3 mm diam.; sepals 2.5–4 mm, apex obtuse; petals ± paler abaxially, bright yellow adaxially, ± obcordate, 3–7 × 2.5–4 mm; filaments 1.3–2 mm, anthers 0.5 mm; carpels 5–12, styles 2–2.5 mm. |
Achenes | 1–1.5 mm, lightly rugose. |
1.5–1.8 mm, smooth to lightly rugose. |
Short | hairs not well differentiated from long hairs, absent or sparse throughout. |
hairs not well differentiated from long hairs, absent or sparse throughout. |
Potentilla wheeleri |
Potentilla demotica |
|
Phenology | Flowering May–Sep. | Flowering May–Jun. |
Habitat | Sandy flats, streamsides, lake margins, open conifer woodlands, alpine fellfields | Crevices on granitic outcrops, in Yellow pine forests |
Elevation | 1800–3500 m (5900–11500 ft) | 2300–2400 m (7500–7900 ft) |
Distribution |
CA
|
AZ |
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.) |
Of conservation concern. Potentilla demotica is known from a single granitic knoll in the Hualapai Mountains, Mohave County. The species was reported as a western range extension of P. subviscosa by M. Butterwick et al. (1991); it differs in rock-dwelling habit, petal color, and epicalyx, among other characters. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 185. | FNA vol. 9, p. 185. |
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Subviscosae | Rosaceae > subfam. Rosoideae > tribe Potentilleae > Potentilla > sect. Subviscosae |
Sibling taxa | ||
Synonyms | P. wheeleri var. paupercula | |
Name authority | S. Watson: Proc. Amer. Acad. Arts 11: 148. (1876) | Ertter: J. Bot. Res. Inst. Texas 1: 53, fig. 2. (2007) |
Web links |