Flora of North America species comparison

erect or ascending, 80–200 cm, branched distally, short appressed-pubescent, pilose, or villous.

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

stipules subulate to narrowly triangular, 3–6 mm;

petiole 10–15(–20) mm, longer than rachis;

leaflet blades ovate-elliptic, obovate, or rounded, apex obtuse or retuse, minutely apiculate, surfaces green, cinereous, or silvery abaxially, sparsely to densely sericeous abaxially, glabrous, sericeous, pilose, or silvery with fine, dense, appressed-silky hairs adaxially;

terminal blade 10–40(–50) × (7–)10–30 mm, length 1.3–1.8 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.

10–40-flowered, axillary from distal leaves or clustered in compound inflorescences, flowers compact to lax, axis and pedicels visible, 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.

longer than subtending leaves.

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

1–2 mm;

bracteoles longer than calyx tube.

1–3 mm;

bracteoles longer than calyx tube.

chasmogamous 7–10 mm;

calyx 7–10 mm, pubescent, tube 1–2 mm;

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

corolla cream-white or creamy with pink or purple at throat;

wings 6–7 mm;

keel 5–6 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 slightly included in calyx, ovate-oblong, 6–8 × 4–5 mm, cleistogamous slightly included in calyx, oblong, 6 × 4 mm;

stipe subsessile.

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

stipe subsessile.

= 20.