Psilostrophe sparsiflora

(A. Gray) A. Nelson

Proc. Biol. Soc. Wash. 16: 23. 1903.

Basionym: Riddellia tagetina var. sparsiflora A. Gray in A. Gray et al., Syn. Fl. N. Amer. 1(2): 318. 1884
Treatment appears in FNA Volume 21. Treatment on page 454.

Biennials or perennials (rarely flowering first year), 10–40+ cm. Stems ± strigillose (greenish, sometimes ± villous in proximal axils). Heads in ± corymbiform arrays. Peduncles 8–12(–25+) mm. Involucres 4–6 mm. Ray florets (1–)2–3(–4); corolla laminae (6–)8–10+ mm, reflexed in fruit. Disc florets 7–9. Cypselae usually glabrous, sometimes gland-dotted; pappi of 4–5 lanceolate to lance-subulate scales 2–3 mm. 2n = 32.

Phenology: Flowering May–Sep.
Habitat: Grasslands, pinyon-juniper scrub, sagebrush scrub, yellow pine forests
Elevation: 900–2200 m


Selected References


Lower Taxa