Flora of North America species comparison

70(–100) dm, gland-dotted distally when young, glands orange, silvery-silky to glabrate.

4–9(–15) dm, gland-dotted when young, silky-pilosulous, hairs retrorse.

divergent;

sterile shoots sharp-tipped or thornlike.

divaricate;

sterile shoots sharp-tipped.

unifoliolate, 0.2–2.2 cm, leaflet 1, blade oblanceolate or cuneate-oblanceolate, surfaces gland-tipped abaxially, strigulose.

pinnate, (1–)1.4–3 cm;

leaflets 7–17(or 19), blades obovate, oblanceolate, linear-oblanceolate, or linear-oblong, 2–7 mm, terminal leaflet shorter than laterals, surfaces sparsely gland-dotted abaxially, strigulose, more strongly so adaxially.

loose;

rachis with thornlike tip in anthesis, 1–4 cm;

bracts ovate, 0.5–8 mm;

bracteoles present.

loose and open;

rachis not spine-tipped in anthesis, (1–)2–9 cm;

bracts ovate-elliptic, 0.6–1.5 mm;

bracteoles absent.

calyx 4.5–5.2 mm, silky-strigulose, tube 3–3.8 mm, ribs not prominent, intervals each with (0 or)1(or 2) large glands, lobes ovate, abaxial lobe shorter;

corolla indigo-blue;

banner obcordate, 6.4–7.5 mm, base auriculate, claw linear to cuneate;

wings broadly oblanceolate, 5.5–6.8 × (2.4–)3–4.5 mm;

keel obovate, 6.6–8.2 × 4.2–5.4 mm;

stamens 9.5–11.5 mm;

filaments distinct to 4.1–4.9 mm;

anthers 0.7–1.1 mm, connective gland-tipped.

calyx 3.7–5 mm, pilosulous throughout, or tube glabrous, lobes pilosulous, tube 2.4–3.3 mm, ribs prominent, intervals each with 1–4 large glands, lobes ovate to oblong-ovate, abaxial lobe shorter;

corolla pink- to violet-purple;

banner (5.5–)6–8.4 mm, ovate to suborbiculate, base cuneate or cordate, claw linear;

wings oblong, 5.8–6.6 × 2.6–3.2 mm;

keel obovate, 5.6–6.7 × 3.4–3.8 mm;

stamens 6–7.7 mm;

filaments distinct to 2.5–3.5 mm;

anthers 0.8–0.9 mm, connective gland-tipped.

obovoid, 3–4 mm, with several glands proximally, pilosulous distally.

obliquely obovoid, 4–4.5 mm, with large glands distally, glabrous proximally, sparsely pilosulous distally.

rarely 2, 3 mm.

2.1–2.6 mm.