Flora of North America species comparison

erect or ascending, 50–100(–150) cm, branched throughout or only distally, appressed- or ascending-pubescent or glabrescent.

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

stipules subulate, 2–4 mm;

petiole 1–3 mm, equaling or longer than rachis;

leaflet blades usually narrowly oblong, rarely elliptic-oblong, with swollen, whitish reticulate veins adaxially, apex apiculate, surfaces densely sericeous abaxially, glabrous adaxially;

laterals without oblique base;

terminal blade 20–45 × 2–7 mm, length 4–8 times width.

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.

10–20+-flowered, densely flowered, flowers chasmogamous and cleistogamous, racemes shorter than to 1–4 times length of subtending leaves.

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

longer (1–2 times) than subtending leaves.

shorter than or equal to subtending leaves.

1–2 mm;

bracteoles longer than calyx tube.

0.5–2 mm;

bracteoles shorter than calyx tube.

chasmogamous 5.5–7 mm;

calyx 5.5–7 mm, densely pubescent, tube 1.5–2 mm;

lobes 5, lateral narrowly deltate, 4–5 mm, apices spinelike;

corolla white to cream;

wings 5.5–6.5 mm;

keel 5–5.3 mm.

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.

chasmogamous included in calyx, rounded, 4–5 mm, cleistogamous similar to chasmogamous, densely strigose;

stipe subsessile.

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.

= 20.