Flora of North America species comparison

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

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.

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

much longer than subtending leaves, patent-pilose.

3–5 mm, patent-pilose;

bracteoles shorter than calyx tube.

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.

body exserted from calyx, rounded, chasmogamous 5–7 mm, cleistogamous 4–6.5 mm;

stipe 1 mm.

= 20.