Flora of North America species comparison

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

cataphylls often present on proximalmost nodes.

erect, to 100 cm;

caudex woody;

proximalmost nodes without leaves or cataphylls.

alternate, odd-pinnate;

stipules present;

petiolate;

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

stipules erect to reflexed, falcately lanceolate to caudate-elliptic, 7–16 mm, glandular, pubescent;

petiole 6–13.5 cm;

leaflet blades usually orbiculate or oblate, rarely ovate or lanceolate, 45–80 × 32–75 mm, base cordate or rounded, apex acute, surfaces pale and eglandular abaxially, dark brown to black-glandular and strigose adaxially.

3–75+-flowered, axillary, pseudoracemes;

bracts soon or tardily deciduous.

long-ellipsoid, nodes 5–12, flowers 2 or 3 per node;

rachis 33–60 mm.

4.5–6.5 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 13–17 mm, dark brown- to black-glandular, hirsute to villose;

corolla purple, banner base greenish, 12–13 × 7.5–9 mm;

stamens 8.5–10.5 mm.

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

9.5–10.5 × 5.5–6 mm, short-hairy.

1, reniform to ellipsoid.

dark red-brown, reniform-ellipsoid, 6–7 × 4–5 mm.

= 11.