Potentilla rimicola

(Munz & I. M. Johnston) Ertter

Phytologia 71: 420. 1992.

Common names: Cliff cinquefoil
Conservation concern
Basionym: Potentilla wheeleri var. rimicola Munz & I. M. Johnston Bull. S. Calif. Acad. Sci. 24: 19. 1925
Treatment appears in FNA Volume 9. Treatment on page 185. Mentioned on page 183.

Short hairs not well differentiated from long hairs, absent or sparse throughout. Stems 0.4–2(–3) dm. Basal leaves palmate, 3–10 cm; petiole 1–7 cm, long hairs abundant, spreading to ascending, 1–3 mm, weak, glands abundant; leaflets 5, central oblanceolate to broadly obovate-cuneate or nearly orbiculate, 1–3 × 0.8–2 cm, scarcely to distinctly petiolulate, distal ± 1/3 of margins evenly incised ± 1/4 to midvein, teeth 2–4 per side, surfaces green, long hairs sparse to abundant, 1 mm, glands ± abundant. Inflorescences 3–20-flowered. Pedicels 0.5–2.5(–4) cm. Flowers: epicalyx bractlets lanceolate-elliptic, rarely linear, 1–2(–5) × 0.5–1.5 mm; hypanthium 2–3.5 mm diam.; sepals 2–4(–5) mm, apex ± acute; petals ± paler abaxially, bright yellow adaxially, ± obcordate, (3–)4–7 × 3–6 mm; filaments 1.5–2.5 mm, anthers 0.5–1 mm; carpels 5–20, styles 1.5–2.5 mm. Achenes 1.5 mm, smooth to faintly rugose.


Phenology: Flowering May–Sep.
Habitat: Crevices on protected faces of granitic outcrops in conifer woodlands
Elevation: 2400–2900 m

Distribution

V9 274-distribution-map.jpg

Calif., Mexico (Baja California).

Discussion

Of conservation concern.

Potentilla rimicola is known only from Tahquitz Peak in the San Jacinto Mountains, Riverside County, California, and the Sierra San Pedro Mártir in Baja California, Mexico. Plants are rooted in rock crevices, often on vertical surfaces, in contrast to P. wheeleri, which is rooted in the ground.

Selected References

None.

Lower Taxa

None.
... more about "Potentilla rimicola"
Barbara Ertter +
(Munz & I. M. Johnston) Ertter +
Potentilla wheeleri var. rimicola +
Cliff cinquefoil +
Calif. +  and Mexico (Baja California). +
2400–2900 m +
Crevices on protected faces of granitic outcrops in conifer woodlands +
Flowering May–Sep. +
Conservation concern +
Potentilla rimicola +
Potentilla sect. Subviscosae +
species +