Zinnia acerosa
desert or shrubby or southern zinnia, desert zinnia
greenish to gray, much branched, pilose.
blades 1-nerved, linear to acerose, 8–20 × 1–2 mm, scabrous to glabrescent.
5–35 mm.
campanulate, 3–5 × 5–7 mm.
4–7;
corollas usually white, sometimes pale yellow, laminae oblong to suborbiculate, 7–10 mm.
8–13;
corollas yellow or tinged with purple (drying reddish), 3–6 mm, lobes 1 mm.
suborbiculate to oblong, becoming scarious proximally, appressed-hairy distally, apices obtuse, ciliate.
2.4–4 mm, 3-angled (ray) or compressed (disc), ribbed, strigose or distally ciliate;
pappi usually of 1–3 unequal awns, sometimes reduced to teeth.
uniformly yellow, apices obtuse, erose.
= 20, 40, or 22.
Zinnia acerosa
Attribution of Zinnia acerosa to Utah (S. L. Welsh et al. 1993) was based on Atwood et al. 9704 (BRY), from Moab, Grand County; the specimen was indicated as “possibly cultivated” by the collector, and it is well outside the known range of the species.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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