Flora of North America species comparison

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

erect or ascending, clustered, 80–200 cm, copiously branched distally, striate, densely ascending or appressed white-pubescent on ridges.

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, 4–8 mm;

petiole 5–10 mm, longer than rachis;

leaflet blades narrowly obovate or narrowly obdeltate, apex obtuse to rounded, truncate, or retuse, apiculate, surfaces densely white-appressed-strigose abaxially, sparsely appressed-puberulent or glabrescent adaxially, scarcely reticulate-veined between principle lateral veins abaxially;

terminal blade 7–32 × 2–8 mm, length 3–5 times width.

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

2–4-flowered, closely flowered, flowers chasmogamous and cleistogamous, chasmogamous with 2–4 flowers, cleistogamous usually with (1 or)2 flowers at base of peduncle, racemes shorter than to 1–4 times length of subtending leaves.

usually much longer than subtending leaves, sericeous.

shorter than subtending leaves, scarcely pedunculate.

0.5–3 mm, appressed-puberulent;

bracteoles shorter than calyx tube.

1.5–2 mm;

bracteoles shorter 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 6.5–8 mm;

calyx 3–4.5 mm, tube 1 mm;

lobes 4, lateral triangular, 2–3.5 mm, deeply 4-lobed, adaxial pair proximally connate most or part of their length;

corolla white to pale yellow and pale purplish striate, or with blotch at throat adaxially, wing and keel petals white;

wings 6–7 mm;

keel 6–7.5 mm; cleistogamous flowers 2 mm, calyx lobes usually 1-veined, rarely with 1 distinct midrib and 2 inconspicuous lateral veins.

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.

sparsely appressed-pubescent or glabrescent;

stipe 0.5 mm; chasmogamous, deciduous, distinctly exserted from calyx, elliptic-oblong or broadly elliptic, 3.5–5 × 2–3 mm, cleistogamous suborbicular, 3 × 2 mm.

= 20.

= 20.