Flora of North America species comparison

10–50 cm, hairs antrorse.

stipules 3–5 mm, acute to acuminate;

leaflets dimorphic, proximal blades obovate, distals narrowly obovate, abaxial surface sparsely pubescent on midrib and margins, hairs appressed or ascending, white, apex retuse or emarginate;

terminal leaflet blade 6–13 × 3–9 mm.

proximal bracts minute, subulate;

second proximal blade elliptic, 0.8 mm, apex acute;

distal blades broadly ovate, 1.6–1.8 mm, 3-veined.

chasmogamous flower 1, cleistogamous flower 0 or 1;

prophylls 1 or 2, blades ovate, proximal one 0.5 mm, second proximal one 1 mm.

to 0.5 mm in cleistogamous flowers, 1–1.5 mm in chasmogamous; glabrous or sparsely puberulent.

elliptic, 2.5–3.5 × 1.5–2.5 mm, sparsely appressed-puberulent, less than 1/2 covered by persistent calyx;

apex rounded.

1.5–1.8 × 1.2 mm.

flowers 5–6 mm;

calyx 1.5–2 mm, glabrous.

flowers often absent, 0.5 mm.

= 20, 22.