Difference between revisions of "Potentilla demotica"

Revision as of 23:10, 16 December 2019

Short hairs not well differentiated from long hairs, absent or sparse throughout. Stems 0.2–1.5(–2) dm. Basal leaves 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 1–7-flowered. Pedicels 0.5–1(–2) cm. Flowers: 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 1.5–1.8 mm, smooth to lightly rugose.

Phenology: Flowering May–Jun.
Habitat: Crevices on granitic outcrops, in Yellow pine forests
Elevation: 2300–2400 m

Ariz.

Discussion

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.

Selected References

None.

Lower Taxa