Flora of North America species comparison

terete, often lignescent at base, from subterranean, branched caudex, sometimes with adventitious roots.

leaflet blades usually ovate-lanceolate, sometimes narrowly lanceolate, margins entire or shallowly, rarely deeply, lobed, sinus 0–1(–6) mm, lateral leaflets 1.5–4.2 × 0.3–2.7 cm, terminal leaflet (1.5–)2–4(–7) × 0.2–2.2(–3) cm, surfaces strigose.

with (1 or)2–6(–11) flower-bearing nodes.

stout, lignescent, (4.4–)6–30 cm, 0.8–1.3 mm diam.

bracteoles 0.8–2.4 mm, shorter than calyx tube;

calyx tube (1.4–)2–4 mm, lobes 1–2.5(–3) mm;

banner pink, 7.3–15 mm;

wings pinkish, 7–12 mm;

keel 8–13 mm, beak prominent, erect, slightly curved, 1.5–2 mm diam., closely positioned to face of banner petal, protruding well above wings.

subcylindric, laterally compressed, 3–7 × 0.2–0.6 cm, glabrate or sparsely strigose.

5–10, sometimes faintly mottled, with cellular or waxy covering.

perennial, with slender taproot.

= 22.