Flora of North America species comparison

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

erect or ascending, clustered, young branches terete, 70–200 cm, branched distally, densely appressed- or patent-pubescent.

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.

usually 2 sizes, axillary ones subtending racemes much smaller;

stipules subulate, 2–4 mm;

petiole 30–40 mm, longer than rachis;

leaflet blades usually elliptic to broadly elliptic or obovate, sometimes suborbiculate, apex retuse to obtuse, apiculate, surfaces appressed-pubescent abaxially, glabrous or sparsely puberulent along midrib adaxially;

terminal blade 20–50 × 10–30 mm, length 1–2 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.

5–15-flowered, flowers chasmogamous only.

longer than subtending leaves.

usually shorter than subtending leaves.

1–2 mm;

bracteoles longer than calyx tube.

0.8–3 mm;

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.

10–15 mm;

calyx 4.5–6 mm, tube 2.5 mm;

lobes 4, subequal or abaxial slightly longer, lateral narrowly triangular-ovate, 2.3–3.5 mm, adaxial connate proximally, apices long-acuminate and spine-tipped;

corolla reddish purple;

wings 8–10.5 mm;

keel 7.5–9.5 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, broadly elliptic to suborbicular, 6–7 × 3.5–4.5 mm, densely white-appressed-pilose, sometimes glabrescent;

stipe subsessile.

= 22.