Flora of North America species comparison

ascending, clustered, 30–100 cm, simple or branched at base, pubescent.

stipules subulate, 3–4 mm;

petiole 5–10 mm, longer than rachis;

leaflet blades narrowly elliptic, apex obtuse to rounded or retuse, apiculate, surfaces appressed-pubescent abaxially, glabrous or sparsely pubescent along midrib adaxially, conspicuously reticulate-veined between principle lateral veins abaxially;

terminal blade 8–30 × 4–16 mm, length 2–3 times width.

4–13-flowered, densely flowered, flowers chasmogamous and cleistogamous, cleistogamous flowers clustered in leaf axils, racemes shorter than to 1–4 times length of subtending leaves.

shorter than or equal to subtending leaves, subsessile or shortly pedunculate, densely pubescent.

1–2 mm;

bracteoles longer than calyx tube.

chasmogamous 7–8 mm;

calyx 4.5–7 mm, tube 1–1.2 mm;

lobes 5, lateral narrowly ovate, 4–6 mm, apices acuminate;

corolla white or yellowish white;

wings 6–6.5 mm;

keel 7–7.3 mm; cleistogamous: calyx 3–4 mm, tube 0.5 mm, lobes narrowly deltate.

body included in calyx, obovate, chasmogamous 3.5–5 × 2.5–3 mm, cleistogamous 3–3.7 × 2–2.5 mm;

stipe subsessile.