Potentilla demotica

Ertter

J. Bot. Res. Inst. Texas 1: 53, fig. 2. 2007.

Common names: Hualapai cinquefoil
Conservation concernEndemic
Treatment appears in FNA Volume 9. Treatment on page 185. Mentioned on page 184.

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

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

None.