Flora of North America species comparison

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

procumbent or trailing, initially ascending, becoming decumbent with continued growth, clustered, slender, to 100 cm, branched much of length, sericeous or glabrescent.

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 subulate, 2–3(–4) mm;

petiole 7–10(–15) mm, equaling or longer than rachis;

leaflet blades usually narrowly elliptic to elliptic, rarely obovate, apex obtuse, scarcely or minutely apiculate, surfaces sericeous abaxially, sparsely sericeous or glabrescent adaxially;

laterals similar to terminal;

terminal blade petiolulate or sessile, 10–20(–25) × 5–10 mm, length 1.5–2.5(–3) 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.

2–6(–10)-flowered, erect, flowers not clustered at apex, flowers chasmogamous and cleistogamous.

longer than subtending leaves.

longer than subtending leaves, filiform, usually sericeous, sometimes glabrescent.

1–2 mm;

bracteoles longer than calyx tube.

0.5–4 mm, appressed-puberulent;

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 6–8 mm;

calyx 3–4 mm, appressed-puberulent, tube 1 mm;

lobes 4, lateral narrowly deltate, 2–2.5 mm, adaxial connate proximally;

corolla usually pink-lavender to violet, rarely whitish;

wings 7–7.5 mm;

keel 6.8–7.3 mm.

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

stipe subsessile.

chasmogamous exserted from calyx, calyx 1/2 loment length, rounded to elliptic, 4–7 × 3–4 mm, cleistogamous rare, exserted from calyx, calyx 1/4–1/3 loment length;

stipe 1.5 mm.

= 20.