Flora of North America species comparison

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Oxytenia

copper-weed
Habit Subshrubs or shrubs, 50–200 cm.
Stems

erect, virgately branched.
Leaves

cauline; alternate;

petiolate or ± sessile;

blades mostly pinnately lobed (lobes 3–7+, linear to filiform), distal (not lobed) linear to filiform, faces usually sericeous to strigillose, sometimes glabrate or glabrous, usually gland-dotted.
Involucres

± hemispheric, 4–5+ mm diam.
Receptacles

convex;

paleae spatulate to cuneiform, membranous, distally ± villous.
Pistillate florets

5;

corollas 0.
Phyllaries

persistent, 10–15+ in 2–3 series, distinct, outer 5–7 herbaceous, inner scarious to membranous (± villous).
Heads

disciform, in (ebracteate or nearly so) paniculiform arrays, or borne singly or in glomerules of 1–5+.
Cypselae

plumply obovoid, obcompressed or weakly 3–4-angled, smooth, ± villous, little, if at all, gland-dotted;

pappi 0.
Functionally

staminate florets 10–25+;

corollas whitish, funnelform, lobes 5, erect (filaments connate, anthers distinct or weakly coherent).
x

= 18.

Oxytenia
Distribution
from USDA
w United States
Discussion

Species 1.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 21, p. 29. Author: John L. Strother.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Ambrosiinae
Subordinate taxa
O. acerosa
Name authority Nuttall: Proc. Acad. Nat. Sci. Philadelphia 4: 20. (1848)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Apiaceae, Boraginaceae, and Polemoniaceae.)

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