Flora of North America species comparison

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Hedosyne

marsh-elder
Habit Annuals, 10–50(–100) cm.
Stems

erect, strictly branched.
Leaves

cauline; mostly alternate;

petiolate;

blades deltate or ovate to lanceolate, 1–3-pinnately lobed (lobes oblong to lance-linear), ultimate margins entire or toothed, faces ± scabrellous and/or hispid, usually gland-dotted.
Involucres

± hemispheric, 4–5 mm diam.
Receptacles

hemispheric;

paleae spatulate to linear, membranous, sparsely hairy or glabrate, usually gland-dotted.
Pistillate florets

5–10;

corollas 0.
Phyllaries

persistent, 10–12+ in 2+ series, distinct, outer 5 herbaceous, inner scarious to membranous.
Heads

± disciform, usually in loose, (± bracteate or ebracteate) paniculiform arrays (sometimes 3–6+ distal to axil of each bract).
Cypselae

pyriform, ± obcompressed, finely striate, glabrous, little, if at all, gland-dotted;

pappi 0.
Functionally

staminate florets 5–10+;

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

= 18.

Hedosyne
Distribution
from USDA
sw United States; n Mexico
[BONAP county map]
Discussion

Species 1.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 21, p. 30. Author: John L. Strother.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Ambrosiinae
Subordinate taxa
H. ambrosiifolia
Name authority Strother: Madroño 47: 204. (2001)
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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