Flora of North America species comparison

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

erect becoming trailing, 50–150 cm, branched much of length, appressed-pubescent and patent-pilose.

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 caducous, subulate, 3–8 mm;

petiole 10–16 mm, longer than rachis;

leaflet blades elliptic or obovate, apex obtuse, scarcely apiculate, surfaces abaxially grayish or pale green, appressed-puberulent or pilose, especially along midrib and margin abaxially, sparsely puberulent or glabrescent adaxially;

terminal blade (10–)15–25(–30) × 6–10 mm, length 1.7–2.2 times width.

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

3–8-flowered, flowers not clustered at apex, flowers chasmogamous and cleistogamous.

usually much longer than subtending leaves, sericeous.

much longer than subtending leaves, patent-pilose.

0.5–3 mm, appressed-puberulent;

bracteoles shorter than calyx tube.

3–5 mm, patent-pilose;

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 5.5–8.5 mm;

calyx 2–4 mm, tube 1–1.5 mm;

lobes 4, lateral narrowly triangular, 1.2–1.5 mm, adaxial connate proximally;

corolla purple;

wings 5–6 mm;

keel 6–6.5 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, rounded, chasmogamous 5–7 mm, cleistogamous 4–6.5 mm;

stipe 1 mm.

= 20.

= 20.