Flora of North America species comparison

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Astragalus sect. Chaetodontes
Habit Herbs perennial, usually caulescent (sometimes subacaulescent in A. austiniae); caudex superficial or subterranean.
Stems

several to many.
Leaves

odd-pinnate, petiolate to subsessile;

leaflets (5 or)7–25(–29).
Racemes

subumbellate, spicate or loosely flowered, flowers erect, ascending, spreading, or declined and secund.
Corollas

whitish, pinkish, grayish lavender, or pale yellow, banner recurved through 35–85°, keel apex round, obtuse, or deltate, sometimes obscurely beaklike.
Calyx

tubes campanulate or turbinate, sometimes accrescent.
Legumes

deciduous, at least eventually, sessile or subsessile, widely spreading to declined, ovoid to oblong, ellipsoid, or lenticular-oblong, compressed laterally or 3-sided, straight, incurved, or falcate, bilocular.
Seeds

4–20.
Hairs

usually basifixed, rarely malpighian.
Stipules

distinct or connate.

Astragalus sect. Chaetodontes
Distribution
nw United States
Discussion

Species 9 (9 in the flora).

Section Chaetodontes is made up of five subsections with its distribution mainly in the Columbia Basin, the lower Snake River Plains, northern Great Basin to the Sierra Nevada, eastern Washington to south-central Idaho, and northeastern and east-central California.

The subsections are: subsect. Chaetodontes (A. Gray) Barneby (Astragalus spaldingii, A. tyghensis); subsect. Lyalliani Barneby (A. lyallii); subsect. Lemmoniani Barneby (A. lemmonii); subsect. Lentiformes (Rydberg) Barneby (A. caricinus, A. lentiformis); and subsect. Andersoniani Barneby (A. andersonii, A. austiniae, A. sepultipes).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus
Subordinate taxa
Name authority A. Gray: Proc. Amer. Acad. Arts 6: 194. (1864)
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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