Potentilla uschakovii

Caudex branches often sheathed with marcescent whole leaves. Stems ascending to nearly erect, 0.3–1.5 dm. Basal leaves often both ternate and palmate or subpalmate on same plant, 1–5 cm; petiole 0.5–3 cm, long hairs sparse to dense, ± appressed to ascending, (1–) 1.5–2.5 mm, soft to ± weak, smooth, short hairs absent or sparse, crisped (/cottony) hairs sparse to common, glands absent or sparse; leaflets 3–5, proximalmost separated by 0–2 mm, central broadly elliptic to obovate, 0.5–2 × 0.3–1.4 cm, petiolules ± 1 mm, distal 2/3 to nearly whole margin incised 2/3–3/5+ to midvein, teeth (2–) 3–4 per side, 3–5 mm, apical tufts 1–1.5 mm, abaxial surfaces grayish white to white, long hairs common to abundant, cottony (/crisped) hairs dense, short hairs and glands absent or obscured, adaxial grayish green to gray, long hairs abundant, 1–2 mm, soft (grading to cottony), short/crisped/cottony hairs common to abundant, glands sparse to common. Cauline leaves 0–1. Inflorescences 1–3 (–4) -flowered, open, branch angle 20–40°. Pedicels 1–1.5 cm, proximal to 3 cm. Flowers: epicalyx bractlets lanceolate to ovate, 3–4 × 1–2 mm; hypanthium 2.5–3.5 mm diam.; sepals 3.5–5 mm, apex obtuse to subacute, glands sparse to common, often ± obscured; petals pale-yellow, often overlapping, 5–7 × 5–8 (–9) mm, distinctly longer than sepals; filaments 0.5–1.5 mm, anthers ± 0.5 mm; carpels 30–60, styles 0.8–0.9 mm. Achenes 1–1.3 mm.

Phenology: Flowering summer.
Habitat: Dry tundra meadows, gravel and loam ridges, loam flats, sandy bluffs
Elevation: 0–200 m

Greenland, N.W.T., Nunavut, e Asia (Russian Far East)

Discussion

For discussion of probable parentage and resultant diagnostic characters, see discussion of 89. Potentilla pedersenii.

Selected References

None.

Lower Taxa