Flora of North America species comparison

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Chorizanthe sect. Acanthogonum
Habit Plants prostrate to spreading or erect.
Stems

not disarticulating at each node.
Leaf

blades oblanceolate to elliptic or round.
Inflorescences

bracts awned or awnless.
Involucres

cylindric, campanulate, or urceolate, not ventricose basally, 3-angled, 3-ribbed, 3-, 5-, or occasionally 6-toothed, without membranous or scarious margins;

awns equal, sometimes anterior one longest.
Flowers

1(–2);

perianth white to rose or yellow, thinly to densely pubescent;

stamens 3, 6, or 9;

filaments adnate faucially at or near top of floral tube.
Achenes

brown to black, lenticular or 3-gonous.

Chorizanthe sect. Acanthogonum
Distribution
w United States; nw Mexico
Discussion

Species 5 (5 in the flora).

G. J. Goodman (1934) assigned Chorizanthe polygonoides to Acanthogonum, which previously included C. rigida and C. corrugata (see below). J. L. Reveal and C. B. Hardham (1989b) considered that taxon to represent a section within Chorizanthe, expanded it further to include both C. orcuttiana and C. watsonii, and divided it into five subsections. Section Acanthogonum differs from sect. Ptelosepala by having involucral tubes that are not both 6-ribbed and 6-toothed at the same time.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 5, p. 466.
Parent taxa Polygonaceae > subfam. Eriogonoideae > Chorizanthe > subg. Amphietes
Subordinate taxa
Synonyms section Acanthogonum, C. section Chorizanthella
Name authority (Torrey) Torrey & A. Gray: Proc. Amer. Acad. Arts 8: 197. (1870)
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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