Flora of North America species comparison

3–10 dm, gland-dotted distally when young, glands prickle-shaped, hairy to glabrate.

irregular, stiff;

sterile shoots often sharp-tipped.

usually pinnate, sometimes unifoliolate distally, (0.3–)1–3.5(–5.5) cm;

leaflets (1 or 3)5–11, blades ovate, obovate, lanceolate, linear, elliptic, rhombic-elliptic, rhombic-ovate, or linear-oblanceolate, 2–14(–17) mm, terminal leaflet seldom longer than laterals, surfaces gland-dotted abaxially, silky-strigulose, villous-tomentulose to glabrate, loosely hairy, or glabrous.

loose;

rachis without thornlike tip in anthesis, (1–)1.5–12 cm;

bracts subulate to linear, 2.5–4 mm;

bracteoles present.

calyx 5–9 mm, pilosulous to minutely puberulent, strigulose, silky-canescent, or glabrate, tube 3–4.5 mm, ribs prominent, broader adaxial intervals with 2 rows, narrower one with 1 row of 3–5 glands, lobes broadly lanceolate, triangular, or lanceolate, abaxial lobe often shorter;

corolla indigo-blue to violet;

banner flabellate to flabellate-ovate, 6.3–10 mm, base cuneate to auriculate, claw cuneate;

wings oblong to oblong-ovate, 5.4–8.2 × 2.2–3.5 mm;

keel obliquely obovate, 5.8–8.4 × 3.3–4.9 mm;

stamens (5.5–)6.5–9.8 mm;

filaments distinct to (3–)3.5–5.6 mm;

anthers (0.8–)0.9–1.3 mm, connective not gland-tipped.

ovoid-ellipsoid or obliquely ellipsoid, 8–10 mm, with scattered blister-glands, glands not confluent, glabrous or sparsely villosulous.

(4.7–)5–6 mm.