Flora of North America species comparison

erect or prostrate, often fistulose, usually pubescent and glandular-punctate;

cataphylls often present on proximalmost nodes.

erect, to 150 cm;

caudex woody;

proximalmost nodes with caducous leaves, without cataphylls.

alternate, odd-pinnate;

stipules present;

petiolate;

leaflets 3, blade margins entire, surfaces pubescent, glandular.

stipules erect, triangular to linear-triangular, 1.5–5 mm, sparsely glandular, densely pubescent;

petiole 0.7–6.2 cm;

leaflet blades lanceolate, 25–97 × 14–51 mm, base broadly attenuate, apex acute, surfaces less densely glandular and strigose abaxially, densely glandular and sparingly puberulent to glabrate adaxially.

3–75+-flowered, axillary, pseudoracemes;

bracts soon or tardily deciduous.

ellipsoid, nodes 6–30, flowers 2 or 3 per node;

rachis 20–152 mm.

4.8–15 cm.

papilionaceous;

calyx tubular-campanulate, lobes 5, not enlarging in fruit, becoming papery, lobes longer than tube;

corolla purple, or greenish tinged violet or purple, banner biauriculate, wings auriculate, keel always shorter than other petals, connate on apical margins, glabrous;

stamens 10, monadelphous early, vexillary stamen becoming distinct;

anthers in 2 series, proximal dorsifixed, distal basifixed;

ovule 1.

calyx 4.5–9 mm, usually eglandular, sometimes lobes glandular, strigose to villose or puberulent;

corolla greenish, tinged violet or purple, banner 5.5–10 × 6–8 mm;

stamens 5.5–8 mm.

legumes, included in calyx, longer than tube, stipitate, compressed, ovate to obovate indehiscent, eglandular, pubescent, with secondary, internal wall of sclereids.

6–8 × 4–5 mm, sparsely strigose.

1, reniform to ellipsoid.

reddish brown, reniform-ellipsoid, 5–7 × 3.4–4.5 mm.

= 11.

= 20.