Flora of North America species comparison

erect or ascending, 80–200 cm, branched distally, short appressed-pubescent, pilose, or villous.

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

stipules subulate to narrowly triangular, 3–6 mm;

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

leaflet blades ovate-elliptic, obovate, or rounded, apex obtuse or retuse, minutely apiculate, surfaces green, cinereous, or silvery abaxially, sparsely to densely sericeous abaxially, glabrous, sericeous, pilose, or silvery with fine, dense, appressed-silky hairs adaxially;

terminal blade 10–40(–50) × (7–)10–30 mm, length 1.3–1.8 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.

10–40-flowered, axillary from distal leaves or clustered in compound inflorescences, flowers compact to lax, axis and pedicels visible, flowers chasmogamous and cleistogamous.

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

longer than subtending leaves.

much longer than subtending leaves, patent-pilose.

1–2 mm;

bracteoles longer than calyx tube.

3–5 mm, patent-pilose;

bracteoles shorter than calyx tube.

chasmogamous 7–10 mm;

calyx 7–10 mm, pubescent, tube 1–2 mm;

lobes 5, lateral narrowly triangular, 7–8 mm, apices spinelike;

corolla cream-white or creamy with pink or purple at throat;

wings 6–7 mm;

keel 5–6 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 slightly included in calyx, ovate-oblong, 6–8 × 4–5 mm, cleistogamous slightly included in calyx, oblong, 6 × 4 mm;

stipe subsessile.

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

stipe 1 mm.

= 20.