Flora of North America species comparison

1–10 cm, rachis longer than longest leaflet;

leaflets 11–15, well distributed on rachis, blade surfaces sericeous.

1.5–10 cm, rachis longer than longest leaflet;

leaflets 11–17, well distributed on rachis, blade surfaces long-pilose.

6–18-flowered.

(3–)5–15-flowered.

erect, 2–15 cm, appressed-pilose, ascending-pilose, or villous-hirsute.

usually villous, sometimes appressed-pilose.

15–18(–20) mm.

15–19 mm.

becoming swollen, accrescent in fruit, constricted at mouth, enclosing mature legume, 10–14(–18) mm.

slightly swollen or not accrescent in fruit, ruptured by (but closely investing) base of exserted pod.

falling enclosed within calyx prior to dehiscence, ovoid, 6–10 × 4–5 mm.

usually persisting on plant within calyx until after dehiscence, swollen to inflated, oblong or ovoid, 8–15 × 4.5–6.5 mm.