Psilostrophe sparsiflora
(A. Gray) A. Nels.
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Family:
Asteraceae
greenstem paperflower
[Riddellia tagetina var. sparsiflora A. Gray]
 Max Licher |
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; pap-pi of 4-5 lanceolate to lance-subulate scales 2-3 mm. 2n = 32. Flowering May-Sep. Grasslands, pinyon-juniper scrub, sagebrush scrub, yellow pine forests; 900-2200 m; Ariz., N.Mex., Utah.
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 Max Licher  Max Licher  Max Licher  Max Licher |
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