Zinnia acerosa
Zinnia violacea
desert or shrubby or southern zinnia, desert zinnia
elegant zinnia, garden zinnia
greenish to gray, much branched, pilose.
greenish, becoming yellowish to purplish, unbranched or sparingly branched distal to bases, hirsute to strigose or scabrous.
blades 1-nerved, linear to acerose, 8–20 × 1–2 mm, scabrous to glabrescent.
blades 3–5-nerved, ovate to oblong, mostly 60–100 × 20–60 mm, scabrellous to glabrate.
5–35 mm.
to 85 mm.
campanulate, 3–5 × 5–7 mm.
± hemispheric or broader, 10–15 × 5–25 mm.
4–7;
corollas usually white, sometimes pale yellow, laminae oblong to suborbiculate, 7–10 mm.
8–21 (more in “double” cultivars);
corollas usually red (white, yellow, or purple in cultivars), laminae spatulate to obovate, 10–35 mm.
8–13;
corollas yellow or tinged with purple (drying reddish), 3–6 mm, lobes 1 mm.
100–150+;
corollas yellow, 7–9 mm, lobes 1–2.5 mm.
suborbiculate to oblong, becoming scarious proximally, appressed-hairy distally, apices obtuse, ciliate.
obovate, becoming scarious, glabrous or sparsely hairy, apices rounded, erose or fimbriate.
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.
6–10 mm, 3-angled (ray) or ± compressed (disc), not or faintly ribbed, ciliolate;
pappi 0.
uniformly yellow, apices obtuse, erose.
red to purple, apices rounded to acute, fimbriate.
= 20, 40, or 22.
= 24.
Zinnia acerosa
Zinnia violacea
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.)
Zinnia violacea is perhaps adventive in Costa Rica, Panama, Cuba, Bolivia, China, and Malesia. The most widely cultivated Zinnia, it is reported to have escaped from cultivation and apparently naturalized in ten eastern and southern states but is nowhere common in the flora area. It is not as weedy as Z. peruviana, possibly because it lacks awns and thus is not as easily dispersed by animals.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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