Flora of North America species comparison

erect to procumbent or decumbent, glabrous or glabrate to pubescent.

single or several, usually erect, sometimes ascending, unbranched or several-branched.

alternate, odd-pinnate;

stipules present;

petiolate;

leaflets 3, blade margins dentate or denticulate, [entire, toothed at base, dissected, or laciniate], surfaces glabrous or sparsely pubescent.

stipules triangular-lanceolate, margins entire, apex acuminate;

leaflet blades obovate or oblong to oblanceolate, 10–30 × 5–15 mm, margins usually dentate, rarely incised, distal portion denticulate.

pedunculate or subsessile, 1–30-flowered, axillary, racemes or flowers subsolitary, [heads or umbels];

bracts absent.

1- or 2-flowered (in axils), subsessile.

not evident.

papilionaceous;

calyx campanulate, symmetric or with 2 larger lobes, lobes 5;

corolla yellow to white, sometimes tinged violet, or pale to lilac-blue, 5.5–18 mm;

stamens 10, diadelphous;

anthers dorsifixed;

style usually relatively long.

12–18 mm;

calyx lobes nearly equal to tube;

corolla yellowish white or white, sometimes tinged violet.

legumes, yellow to light brown, stipitate, sometimes compressed, linear and subterete, ovoid, or rhomboid-obovoid [reniform, lunate, semicircular, moniliform], not coiled, often curved [or prickly], [margins rarely winged or fimbriate], usually beaked, dehiscent, sometimes tardily so, thickly leathery, glabrous or sparsely pubescent.

erect or patent, seed-bearing (proximal) part linear, somewhat flattened, 50–110(–150) × 3–6 mm, gradually tapering into beak (10–)20–40(–50) mm.

1–20[–40], oblong or ovoid, usually tuberculate or verrucose, sometimes smooth.

10–20, usually yellow- or pale brown, rarely rose-yellow, white, bluish, or olive green, oblong or ovoid, 3–5 × 2–3 mm.

= 8.

= 16.