Flora of North America species comparison

(tuberiform, fragile) moniliform, segments fusiform, 3–6 mm diam. (fleshy).

slender, to 2 mm diam.

erect, unbranched, 1.2–3(–4) dm, glabrous or pubescent.

usually procumbent, sometimes erect, (not flexuous), unbranched or branched, (1–)1.5–3(–5) dm.

(soon withered), not rosulate.

3-foliolate, to 24 cm, leaflets petiolulate or subsessile;

petiole (3–)5–12(–16) cm;

lateral leaflets subsessile or petiolulate (0.2–1 cm), blade similar to terminal leaflet or smaller;

terminal leaflet (petiolule) (0.2–)0.5–1.5(–2) cm, blade broadly ovate to rhombic-obovate, 1.5–6(–8) cm, base usually cuneate, rarely subtruncate, margins coarsely dentate to crenate or 3-lobed, surfaces puberulent or not.

absent.

2 (or 3), 3-foliolate (usually alternate, rarely opposite, different in morphology from rhizomal), petiolate, leaflets petiolulate or sessile;

petiole 0.5–2 cm, base not auriculate;

lateral leaflets sessile, blade similar to terminal, smaller, margins usually dentate, rarely entire;

terminal leaflet sessile or petiolulate, blade narrowly lanceolate to narrowly oblong or oblong-lanceolate, 2–7 × 0.3–0.6 cm, margins minutely puberulent.

simple, petiolate;

petiole (0.3–)0.5–2.5(–4) cm, base not auriculate;

blade oblong, ovate, suborbicular, or cordate, (0.5–)1–4.5(–5.5) cm × (5–)10–40(–54) mm, base cordate, rounded, or truncate, margins entire, repand, or sinuate, (distally with shorter petiole, blade smaller).

ebracteate.

ebracteate.

sepals oblong, 5–7.5 × 1–2 mm, lateral pair slightly saccate basally;

petals purple to pale pink, oblanceolate, 9–18 × 2–5 mm (clawed, apex rounded);

filaments: median pairs 5–10 mm, lateral pair 3.5–8 mm;

anthers linear, 1.5–3 mm.

sepals oblong, 2–3 × 1–1.7 mm, lateral pair not saccate basally;

petals white, broadly oblanceolate, spreading, 5–7(–8) × 2–3 mm, (not clawed, apex rounded);

filaments: median pairs 3.5–4.5 mm, lateral pair 2.7–3.5 mm;

anthers oblong, 0.8–1.2 mm.

ascending to divaricate, 15–40 mm.

divaricate to ascending, (6–)10–15(–20) mm.

linear, 2.5–4 cm × 1.5–2.5 mm;

ovules 8–12 per ovary;

style (5–)7–11 mm.

linear, (torulose), 1–1.5(–2) cm × 0.8–1.1 mm;

ovules 40–80 per ovary;

style 1.5–2.5 mm.

dark brown, oblong, 2–2.5 × 1–1.5 mm.

brown, oblong to ovoid, 0.9–1.1 × 0.5–0.6 mm.

= ca. 128.