Flora of North America species comparison

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

erect, slender, 70–100 cm, mostly simple, with axillary, exserted inflorescences distally, pubescent.

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.

stipules subulate to narrowly triangular, to 5 mm;

petiole 6–10 mm, longer than rachis;

leaflet blades linear to narrowly oblong, apex rounded or obtuse, apiculate, surfaces densely sericeous abaxially, uniformly appressed-pubescent adaxially;

terminal blade 20–40 × 2–7 mm, length 2.5–7 times width.

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

8–15-flowered, flowers lax on axis, flowers chasmogamous, cleistogamous rare, racemes shorter than to 1–4 times length of subtending leaves.

longer than subtending leaves.

equal to or much longer than subtending leaves.

1.5–5 mm;

bracteoles shorter than calyx tube.

to 1 mm;

bracteoles longer than calyx tube.

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 5–6 mm;

calyx 4.5–6 mm, longer than corolla and loments, tube 1 mm;

lobes 5, lateral narrowly triangular to subulate, 4–5 mm, setaceous, villous, apices spinelike;

corolla whitish yellow or lavender-tinged;

wings 4.5–5.2 mm;

keel 4–4.5 mm.

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

stipe 1–2 mm.

chasmogamous included in calyx, rounded, 4–6 mm, cleistogamous similar to chasmogamous;

stipe subsessile.

= 22.