Flora of North America species comparison

erect or ascending, clustered, 80–200 cm, copiously branched distally, striate, densely ascending or appressed white-pubescent on ridges.

erect or ascending, clustered, young branches terete, 70–200 cm, branched distally, densely appressed- or patent-pubescent.

stipules subulate, 4–8 mm;

petiole 5–10 mm, longer than rachis;

leaflet blades narrowly obovate or narrowly obdeltate, apex obtuse to rounded, truncate, or retuse, apiculate, surfaces densely white-appressed-strigose abaxially, sparsely appressed-puberulent or glabrescent adaxially, scarcely reticulate-veined between principle lateral veins abaxially;

terminal blade 7–32 × 2–8 mm, length 3–5 times width.

usually 2 sizes, axillary ones subtending racemes much smaller;

stipules subulate, 2–4 mm;

petiole 30–40 mm, longer than rachis;

leaflet blades usually elliptic to broadly elliptic or obovate, sometimes suborbiculate, apex retuse to obtuse, apiculate, surfaces appressed-pubescent abaxially, glabrous or sparsely puberulent along midrib adaxially;

terminal blade 20–50 × 10–30 mm, length 1–2 times width.

2–4-flowered, closely flowered, flowers chasmogamous and cleistogamous, chasmogamous with 2–4 flowers, cleistogamous usually with (1 or)2 flowers at base of peduncle, racemes shorter than to 1–4 times length of subtending leaves.

5–15-flowered, flowers chasmogamous only.

shorter than subtending leaves, scarcely pedunculate.

usually shorter than subtending leaves.

1.5–2 mm;

bracteoles shorter than calyx tube.

0.8–3 mm;

bracteoles shorter than calyx tube.

chasmogamous 6.5–8 mm;

calyx 3–4.5 mm, tube 1 mm;

lobes 4, lateral triangular, 2–3.5 mm, deeply 4-lobed, adaxial pair proximally connate most or part of their length;

corolla white to pale yellow and pale purplish striate, or with blotch at throat adaxially, wing and keel petals white;

wings 6–7 mm;

keel 6–7.5 mm; cleistogamous flowers 2 mm, calyx lobes usually 1-veined, rarely with 1 distinct midrib and 2 inconspicuous lateral veins.

10–15 mm;

calyx 4.5–6 mm, tube 2.5 mm;

lobes 4, subequal or abaxial slightly longer, lateral narrowly triangular-ovate, 2.3–3.5 mm, adaxial connate proximally, apices long-acuminate and spine-tipped;

corolla reddish purple;

wings 8–10.5 mm;

keel 7.5–9.5 mm.

sparsely appressed-pubescent or glabrescent;

stipe 0.5 mm; chasmogamous, deciduous, distinctly exserted from calyx, elliptic-oblong or broadly elliptic, 3.5–5 × 2–3 mm, cleistogamous suborbicular, 3 × 2 mm.

body exserted from calyx, broadly elliptic to suborbicular, 6–7 × 3.5–4.5 mm, densely white-appressed-pilose, sometimes glabrescent;

stipe subsessile.

= 20.

= 22.