Flora of North America species comparison

ascending or erect, clustered, 30–160 cm, initially wandlike, branched apically, villosulous or appressed-pubescent.

ascending or sprawling, clustered, 10–50 cm, branched much of length, sericeous or glabrescent.

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.

usually 2 sizes, axillary ones subtending racemes much smaller;

stipules subulate, 2.5–6 mm;

petiole (5–)10–15(–20) mm, longer than rachis;

leaflet blades elliptic to narrowly elliptic, apex obtuse or retuse, apiculate, surfaces sericeous abaxially, glabrous adaxially;

laterals similar to terminal, without oblique base;

terminal blade 10–30(–40) × 8–22 mm (6–10 mm in axillary leaves), length 1.4–2.5 times width.

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

slender, 4–7-flowered, flowers not clustered at apex, flowers chasmogamous and cleistogamous.

shorter than or equal to subtending leaves.

usually much longer than subtending leaves, sericeous.

0.5–2 mm;

bracteoles shorter than calyx tube.

0.5–3 mm, appressed-puberulent;

bracteoles shorter than calyx tube.

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 6.5–9 mm;

calyx 4–6 mm, appressed-puberulent, tube 1–1.2 mm;

lobes 4, lateral narrowly triangular, 2.5–3 mm, adaxial connate proximally, apices acuminate;

corolla purple;

wings 5.5–6.5 mm;

keel 6–8 mm.

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.

chasmogamous as long as calyx, ovate to rounded, 5–7 mm, cleistogamous exserted from calyx, calyx 1/5 loment length, rounded, 4–5 mm;

stipe subsessile.

= 20.

= 20.