Flora of North America species comparison

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

ascending or pendent, clustered, 50–300 cm, branched throughout, young branches densely covered with appressed to spreading whitish to yellowish hairs.

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.

gradually smaller distally;

stipules subulate to narrowly deltate, 4–8 mm;

petiole 10–50 mm, longer than rachis;

leaflet blades narrowly elliptic to elliptic, ovate, or oblong, apex acute or obtuse, apiculate, surfaces densely appressed-pubescent abaxially, glabrous or sparsely to densely puberulent or pubescent adaxially;

terminal blade 20–90 × 10–50 mm, length 1.5–2.2 times width.

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

5–20-flowered, single or compound and appearing terminal and paniculate, flowers chasmogamous only.

shorter than or equal to subtending leaves.

longer than subtending leaves.

0.5–2 mm;

bracteoles shorter than calyx tube.

1.5–5 mm;

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.

12–16 mm;

calyx 3.5–6 mm, tube 1.6–1.9 mm;

lobes 4, lateral narrowly ovate-triangular, 2.2–3.6 mm, apices acute to shortly acuminate, not spine-tipped;

corolla usually reddish purple, rarely white, banner with darker marks at throat on adaxial surface;

wings 8.5–10.5 mm;

keel 10.5–15 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.

body exserted from calyx, elliptic, 5–14 × 4–6 mm, slightly to densely white appressed-pilose, sometimes glabrescent;

stipe 1–2 mm.

= 20.

= 22.