Flora of North America species comparison

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

erect or ascending, clustered, young branches terete, 70–200 cm, branched distally, densely appressed- or patent-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.

usually 2 sizes, axillary ones subtending racemes much smaller;

stipules subulate, 2–4 mm;

petiole 30–40 mm, longer than rachis;

leaflet blades usually elliptic to broadly elliptic or obovate, sometimes suborbiculate, apex retuse to obtuse, apiculate, surfaces appressed-pubescent abaxially, glabrous or sparsely puberulent along midrib adaxially;

terminal blade 20–50 × 10–30 mm, length 1–2 times width.

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

5–15-flowered, flowers chasmogamous only.

equal to or much longer than subtending leaves.

usually shorter than subtending leaves.

to 1 mm;

bracteoles longer than calyx tube.

0.8–3 mm;

bracteoles shorter 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.

10–15 mm;

calyx 4.5–6 mm, tube 2.5 mm;

lobes 4, subequal or abaxial slightly longer, lateral narrowly triangular-ovate, 2.3–3.5 mm, adaxial connate proximally, apices long-acuminate and spine-tipped;

corolla reddish purple;

wings 8–10.5 mm;

keel 7.5–9.5 mm.

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

stipe subsessile.

body exserted from calyx, broadly elliptic to suborbicular, 6–7 × 3.5–4.5 mm, densely white-appressed-pilose, sometimes glabrescent;

stipe subsessile.

= 22.