Flora of North America species comparison

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

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

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.

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

5–15-flowered, flowers chasmogamous only.

usually much longer than subtending leaves, sericeous.

usually shorter than subtending leaves.

0.5–3 mm, appressed-puberulent;

bracteoles shorter than calyx tube.

0.8–3 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.

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 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.

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

stipe subsessile.

= 20.

= 22.