Astragalus

1. Ovary and fruit ± densely pubescent with long hairs; escapes from cultivation in disturbed places.

A. cicer

1. Ovary and fruit glabrous or nearly so; native species.

2. Pubescence of stem and leaves including many 2-pronged hairs; stipules (at least the lower) connate with a belt of tissue around the stem; fruit 4.5–6.5 mm thick, 2-locular; plants rhizomatous.

A. canadensis

2. Pubescence of stem and leaves all of simple hairs; stipules not connate; fruit 10–15 mm thick, 1-locular; plant from a taproot.

A. neglectus

All species found in Astragalus

Astragalus canadensisCANADIAN MILK-VETCH 
Astragalus cicerCHICK-PEA MILK-VETCH 
Astragalus neglectusCOOPER'S MILK-VETCH 

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. March 27, 2017. http://michiganflora.net/genus.aspx?id=Astragalus.