Flora of North America species comparison

erect, slender, 70–100 cm, mostly simple, with axillary, exserted inflorescences distally, pubescent.

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

stipules subulate to narrowly triangular, to 5 mm;

petiole 6–10 mm, longer than rachis;

leaflet blades linear to narrowly oblong, apex rounded or obtuse, apiculate, surfaces densely sericeous abaxially, uniformly appressed-pubescent adaxially;

terminal blade 20–40 × 2–7 mm, length 2.5–7 times width.

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.

8–15-flowered, flowers lax on axis, flowers chasmogamous, cleistogamous rare, racemes shorter than to 1–4 times length of subtending leaves.

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.

equal to or much longer than subtending leaves.

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

to 1 mm;

bracteoles longer than calyx tube.

1–2 mm;

bracteoles longer than calyx tube.

chasmogamous 5–6 mm;

calyx 4.5–6 mm, longer than corolla and loments, tube 1 mm;

lobes 5, lateral narrowly triangular to subulate, 4–5 mm, setaceous, villous, apices spinelike;

corolla whitish yellow or lavender-tinged;

wings 4.5–5.2 mm;

keel 4–4.5 mm.

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.

chasmogamous included in calyx, rounded, 4–6 mm, cleistogamous similar to chasmogamous;

stipe subsessile.

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

stipe subsessile.