Flora of North America species comparison

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

ascending or erect, clustered, 30–160 cm, initially wandlike, branched apically, villosulous or appressed-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 to narrowly triangular, to 6 mm;

petiole 7–12 mm, longer than rachis;

leaflet blades narrowly elliptic-oblong to linear, base obtuse or cuneate, apex apiculate, surfaces appressed-pubescent abaxially, usually sparsely appressed-pubescent, sometimes glabrescent (but not glabrous), adaxially;

laterals similar to terminal;

terminal blade 10–35 × 3–5 mm, length 3–7 times width.

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

4–14-flowered, crowded distally, flowers chasmogamous and cleistogamous.

equal to or much longer than subtending leaves.

shorter than or equal to subtending leaves.

to 1 mm;

bracteoles longer than calyx tube.

0.5–2 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.

chasmogamous 5–7 mm;

calyx 3–4.5 mm, tube 1 mm;

lobes 4, lateral narrowly triangular, 1–1.5 mm, adaxial connate proximally;

corolla pink to purple;

wings 5–6 mm;

keel 4.5–5 mm.

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

stipe subsessile.

chasmogamous exserted from calyx, suborbicular, 4–7 mm, cleistogamous exserted from calyx, calyx 1/5–2/5 loment length, similar to chasmogamous, 3.5–5 mm;

stipe 1 mm.

= 20.