Flora of North America species comparison

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

erect or ascending, 50–100(–150) cm, branched throughout or only distally, appressed- or ascending-pubescent or glabrescent.

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 subulate, 2–4 mm;

petiole 1–3 mm, equaling or longer than rachis;

leaflet blades usually narrowly oblong, rarely elliptic-oblong, with swollen, whitish reticulate veins adaxially, apex apiculate, surfaces densely sericeous abaxially, glabrous adaxially;

laterals without oblique base;

terminal blade 20–45 × 2–7 mm, length 4–8 times width.

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

10–20+-flowered, densely flowered, flowers chasmogamous and cleistogamous, racemes shorter than to 1–4 times length of subtending leaves.

usually much longer than subtending leaves, sericeous.

longer (1–2 times) than subtending leaves.

0.5–3 mm, appressed-puberulent;

bracteoles shorter than calyx tube.

1–2 mm;

bracteoles longer 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 5.5–7 mm;

calyx 5.5–7 mm, densely pubescent, tube 1.5–2 mm;

lobes 5, lateral narrowly deltate, 4–5 mm, apices spinelike;

corolla white to cream;

wings 5.5–6.5 mm;

keel 5–5.3 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.

chasmogamous included in calyx, rounded, 4–5 mm, cleistogamous similar to chasmogamous, densely strigose;

stipe subsessile.

= 20.