Flora of North America species comparison

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

cylindrical, slender, 0.7–1.5 mm diam.

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

erect or ascending, unbranched, 0.3–1.5(–2) dm.

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.

pinnately 5 or 7-foliolate, (1.3–)2.5–6.5 cm, (not fleshy), leaflets petiolulate;

petiole (0.5–)1.5–5.5 cm;

lateral leaflets similar to terminal, blade sometimes smaller;

terminal leaflet (petiolule 0.15–0.7 cm), blade ovate to elliptic, (0.2–)0.4–1.2(–1.5) cm × (1–)2.5–6 mm, base cuneate to obtuse, margins entire, (apiculate).

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.

1–3, 5 or 7-foliolate, petiolate, leaflets petiolulate or subsessile;

petiole 0.2–1.5 cm, base not auriculate;

lateral leaflets similar to terminal;

terminal leaflet (subsessile or petiolule to 0.2 cm), blade ovate to elliptic, 0.6–1.3 × 0.1–0.7 cm, base cuneate, margins entire.

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 ovate to oblong, 3–4 × 1.8–2.5 mm, lateral pair slightly saccate basally;

petals usually white, rarely lavender, broadly obovate, 7–10 × 3–6 mm, (clawed, apex rounded);

filaments: median pairs 3–4.5 mm, lateral pair 2–3 mm;

anthers oblong, 1–1.5 mm.

ascending to divaricate, 15–40 mm.

erect to ascending, 7–15(–25) mm.

linear, 2.5–4 cm × 1.5–2.5 mm;

ovules 8–12 per ovary;

style (5–)7–11 mm.

linear, 2–3 cm × 1.2–1.7 mm;

ovules 12–16 per ovary;

style 1–2 mm.

dark brown, oblong, 2–2.5 × 1–1.5 mm.

brown, oblong, ca. 1.5 × 1 mm.

= ca. 128.

= 28, 42, 64.