Horkelia hispidula
in N. L. Britton et al., N. Amer. Fl. 22: 278. 1908.
Plants 0.7–3 dm diam. Stems ascending to erect, 1–2.5 dm. Basal leaves 3–10 × 0.4–0.8 cm; leaflets (6–)10–14 per side, ± overlapping at least distally, cuneate to flabellate, 2.5–4(–6) mm, divided 3/4+ to midrib into 3–6 oblanceolate to obovate lobes, hispid. Cauline leaves 3–7. Pedicels 2–8(–12) mm. Flowers 3–15, 10 mm diam.; epicalyx bractlets linear to lanceolate, 1.5–3 × 0.2–0.5 mm, ± 2/3 length of sepals; hypanthium 1.8–3 × 3–4 mm, ± 1/2 as deep as wide, interior sparsely pilose; sepals reflexed, broadly lanceolate, 2.5–4(–5) mm, hairs stiff, 0.5 mm; petals not pink-tinged, oblanceolate to oblong or narrowly elliptic, 2.5–5 mm, apex rounded to truncate, sometimes slightly emarginate or mucronate; filaments white, 0.5–2 × 0.4–0.6 mm, glabrous or sparsely pilose adaxially, anthers 0.5–0.9 mm; carpels (10–)12–18(–20); styles 1.8–2.2 mm. Achenes brown to dark brown, 1.5–2 mm.
Phenology: Flowering summer.
Habitat: Dry, rocky alpine flats, in subalpine conifer woodlands
Elevation: 3000–3400 m
Discussion
Of conservation concern.
When describing Horkelia hispidula, Rydberg associated it with H. sericata in his group Sericatae. The species is known only from the White Mountains of California and adjacent Nevada.
Selected References
None.