Flora of North America species comparison

ascending or erect, clustered, slender, 70–150 cm, simple or branched apically, villosulous or strigose.

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, 3–5 mm;

petiole 7–10 mm, longer than rachis;

leaflet blades elliptic to elliptic-oblong, base obtuse, apex obtuse to retuse, apiculate, surfaces appressed-pubescent or subappressed-pilose abaxially, lateral veins often conspicuous abaxially, sparsely appressed-pubescent adaxially;

laterals similar to terminal;

terminal blade 10–40 × 5–12 mm, length 1.5–2.5(–3) 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.

5–15-flowered, flowers clustered distally, shortly glomerate, flowers chasmogamous and cleistogamous.

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

shorter than or equal to subtending leaves.

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

0.5–2 mm;

bracteoles shorter than calyx tube.

0.5–4 mm, appressed-puberulent;

bracteoles shorter than calyx tube.

chasmogamous 5–6 mm;

calyx 3–4 mm, sericeous or villous, tube 1 mm;

lobes 4, lateral narrowly triangular, 2–2.5 mm, adaxial connate proximally, apices acuminate;

corolla purple;

wings 5.7–6.2 mm;

keel 5–5.3 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 exserted from calyx, calyx 2/5 loment length, ovate, 4–6 mm, cleistogamous exserted from calyx, ovate, 4–5 mm, sericeous or villous;

stipe 0.2 mm.

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.

= 20.