Flora of North America species comparison

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

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.

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

longer (1–2 times) than subtending leaves.

1–2 mm;

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

stipe subsessile.