Flora of North America species comparison

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Astragalus accidens var. hendersonii
Photo is of parent taxon

Henderson's milk vetch
Leaflets

(15–)19–27, blade surfaces glabrous or sparsely pubescent adaxially.
Peduncles

7–15 cm, usually slightly longer than leaves.
Legumes

16–25 × 8–12 mm, glabrous;

stipe ± stout, 6–12 mm.
2n

= 26.

Astragalus accidens var. hendersonii
Phenology Flowering late Apr–Jul.
Habitat Grassy or brushy slopes, open woods, and oak thickets on igneous bedrock.
Elevation 200–1300 m. (700–4300 ft.)
Distribution
from FNA
CA; OR
[BONAP county map]
Discussion

R. C. Barneby (1964) proposed that var. hendersonii, a northwestern California and southwestern Oregon endemic, is ancestral to the typical variety because of the wide dispersion and fragmented distribution of var. hendersonii. Astragalus pacificus E. Sheldon is an illegitimate name that pertains here.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Pruniformes > Astragalus accidens
Sibling taxa
A. accidens var. accidens
Synonyms A. hendersonii, A. cymatodes, A. pruniformis, A. watsonii, Hesperonix watsonii
Name authority M. E. Jones: Rev. N.-Amer. Astragalus, 164. (1923) — (as hendersoni)
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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