Flora of North America species comparison

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

procumbent and spreading, to 100 cm, branched much of length, villosulous and patent-pilose.

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.

stipules subulate to narrowly triangular, 2–5 mm;

petiole 5–15 mm, longer than rachis;

leaflet blades elliptic to broadly elliptic, apex obtuse or emarginate, apiculate, surfaces uniformly to densely pubescent or pilose abaxially, sparsely to uniformly pubescent adaxially;

terminal blade 10–35 × 12–18 mm, length 1.2–2 times width.

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

4–14-flowered, flowers not clustered at apex, flowers chasmogamous and cleistogamous, cleistogamous flowers subsessile and clustered in leaf axils, or borne distally on axis.

equal to or much longer than subtending leaves.

longer than subtending leaves, patent-pilose.

to 1 mm;

bracteoles longer than calyx tube.

0.5–2 mm, patent-pilose;

bracteoles shorter than calyx tube.

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.

chasmogamous 6.2–6.8 mm;

calyx 3.5–4 mm, tube 1–1.5 mm;

lobes 4, lateral narrowly triangular, 2–2.5 mm, adaxial connate proximally;

corolla pink to pink-purple;

wings 6.1–6.5 mm;

keel 6 mm.

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

stipe subsessile.

elliptic, sparsely appressed-puberulent or glabrescent;

stipe 0 mm; chasmogamous exserted 1/2+ from calyx, 4.5–5.5 mm, cleistogamous included in calyx.

= 20.