Flora of North America species comparison

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

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

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.

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.

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

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

usually much longer than subtending leaves, sericeous.

shorter than or equal to subtending leaves.

0.5–3 mm, appressed-puberulent;

bracteoles shorter than calyx tube.

0.5–2 mm;

bracteoles shorter than calyx tube.

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 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 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.

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.

= 20.