Flora of North America species comparison

ascending or erect, clustered, 30–160 cm, initially wandlike, branched apically, villosulous or appressed-pubescent.

erect or ascending, clustered, 50–150 cm, simple or branched distally, villous.

stipules subulate to narrowly triangular, to 6 mm;

petiole 7–12 mm, longer than rachis;

leaflet blades narrowly elliptic-oblong to linear, base obtuse or cuneate, apex apiculate, surfaces appressed-pubescent abaxially, usually sparsely appressed-pubescent, sometimes glabrescent (but not glabrous), adaxially;

laterals similar to terminal;

terminal blade 10–35 × 3–5 mm, length 3–7 times width.

stipules subulate to narrowly triangular, to 6 mm;

petiole 1–3 mm, shorter than rachis;

leaflet blades usually narrowly elliptic-oblong, rarely linear, with raised, whitish reticulate veins adaxially, apex apiculate, surfaces densely whitish gray- or silvery-sericeous abaxially, densely appressed-sericeous or glabrescent adaxially;

laterals slightly smaller;

terminal blade 20–40 × 2–14 mm, length 2–5(–8) times width.

4–14-flowered, crowded distally, flowers chasmogamous and cleistogamous.

capitate, 15+-flowered, flowers closely clustered distally, congested, flowers chasmogamous and cleistogamous, racemes shorter than to 1.5 length of subtending leaves.

shorter than or equal to subtending leaves.

shorter to longer (to 1.5 times) than subtending leaves.

0.5–2 mm;

bracteoles shorter than calyx tube.

1–3 mm;

bracteoles longer than calyx tube.

chasmogamous 5–7 mm;

calyx 3–4.5 mm, tube 1 mm;

lobes 4, lateral narrowly triangular, 1–1.5 mm, adaxial connate proximally;

corolla pink to purple;

wings 5–6 mm;

keel 4.5–5 mm.

chasmogamous 8–12 mm;

calyx 8–12 mm, longer than corolla, tube 2 mm;

lobes 5, lateral narrowly ovate, 7–8 mm, apices spinelike;

corolla yellow-white or cream and often purple-marked;

wings 6.5–7 mm;

keel 6 mm.

chasmogamous exserted from calyx, suborbicular, 4–7 mm, cleistogamous exserted from calyx, calyx 1/5–2/5 loment length, similar to chasmogamous, 3.5–5 mm;

stipe 1 mm.

chasmogamous included in calyx, oblong, 4–7 × 3–4 mm, cleistogamous similar to chasmogamous, sericeous;

stipe subsessile.

= 20.

= 20.