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 becoming trailing, 50–150 cm, branched much of length, appressed-pubescent and patent-pilose.

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 caducous, subulate, 3–8 mm;

petiole 10–16 mm, longer than rachis;

leaflet blades elliptic or obovate, apex obtuse, scarcely apiculate, surfaces abaxially grayish or pale green, appressed-puberulent or pilose, especially along midrib and margin abaxially, sparsely puberulent or glabrescent adaxially;

terminal blade (10–)15–25(–30) × 6–10 mm, length 1.7–2.2 times width.

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

3–8-flowered, flowers not clustered at apex, flowers chasmogamous and cleistogamous.

longer than subtending leaves.

much longer than subtending leaves, patent-pilose.

1.5–5 mm;

bracteoles shorter than calyx tube.

3–5 mm, patent-pilose;

bracteoles shorter 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 5.5–8.5 mm;

calyx 2–4 mm, tube 1–1.5 mm;

lobes 4, lateral narrowly triangular, 1.2–1.5 mm, adaxial connate proximally;

corolla purple;

wings 5–6 mm;

keel 6–6.5 mm.

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

stipe 1–2 mm.

body exserted from calyx, rounded, chasmogamous 5–7 mm, cleistogamous 4–6.5 mm;

stipe 1 mm.

= 22.

= 20.