Flora of North America species comparison

erect, pubescent to glabrate.

clustered, 3–8 dm.

alternate, odd-pinnate;

stipules present;

petiolate;

leaflets (7–)15–21, stipels absent, blade margins entire, surfaces pubescent abaxially, glabrous adaxially.

15–20 cm;

stipules amplexicaul (or distinct), scarious;

petiole 4–10 cm;

leaflet blades obovate to narrowly elliptic, 10–25 × 3–6 mm, apiculate, surfaces appressed-pubescent abaxially, hairs 0.7 mm, these sometimes restricted to midrib, red-dotted adaxially.

(4–)5–12 × 1–1.5 cm;

bracts 3 mm, longer than pedicels;

bracteoles subulate, 0.5 mm, from pedicel apex.

30+-flowered, axillary racemes;

bracts and bracteoles present.

8–30 cm.

sub-papilionaceous;

calyx campanulate, lobes 5;

corolla pink-purple, wings much shorter than other petals;

stamens 10, monadelphous, adaxial filament distinct basally;

anthers dorsifixed, equal.

calyx 5–7 mm, lobes subulate, longer than tube;

corolla 8–15 mm, wings less than 1 mm.

loments, sessile, flattened [to rounded], ovoid to obovoid, indehiscent, winged, edge prickly [to warty], coarsely reticulate, pubescent to glabrate.

1, reniform.

dark olive to brown or black, 4–6 mm.

exserted from persistent calyx, 5–7 × 4–6 mm, coarsely raised-reticulate, abaxial edge with prickly wing (surface reticulations sometimes also prickly), densely appressed-pubescent.

= 7, [8].

= 28.