Flora of North America species comparison

1–2.5 dm, eglandular and usually glabrous or sparsely strigulose when young, rarely canescent.

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

divaricate;

sterile shoots on shorter lateral branches sharp-tipped.

divergent;

sterile shoots sharp-tipped or thornlike.

unifoliolate or pinnate, (0.7–)1–3 cm;

leaflets 1 (or 3), blades linear, 6–30 mm, terminal leaflet longer than laterals, surfaces usually glabrous with glandular margins abaxially, densely silvery-pubescent adaxially.

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

loose;

rachis without thornlike tip in anthesis, 1–9 cm;

bracts triangular-subulate, 0.5–1.3 mm;

bracteoles present.

loose;

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

bracts ovate, 0.5–8 mm;

bracteoles present.

calyx (4–)4.6–5.7(–6.5) mm, glabrous or strigulose externally, tube (2.8–)3.3–4.3(–4.6) mm, ribs prominent, narrow abaxial intervals each with 1–5 glands in 1 row, broader adaxial intervals each with 1–17 glands in 2 rows, lobes ovate-deltate to triangular, abaxial lobe slightly shorter and narrower;

corolla deep blue, banner with yellow eye;

banner flabellate, (6.4–)7.1–10.5 mm, tapered to cuneate claw, apex retuse;

wings broadly oblong, (6–)7–8.6 × 3–4.2 mm;

keel broadly oblong, (6.1–)6.5–8(–8.8) × 3.7–4.7 mm;

stamens 7–11 mm;

filaments distinct to 3.5–6.5 mm;

anthers 0.9–1.3 mm, connective not gland-tipped.

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.

obovoid, 7–10 mm, with large, separate glands, puberulent distally.

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

6–8 mm.

rarely 2, 3 mm.

= 20.