Flora of North America species comparison

absent.

(tuberiform, fragile), globose to ovoid or suboblong, (3–)4–10 mm diam., (fleshy, deeply underground).

(simple or several from base), erect or decumbent, (flexuous or straight, narrowly winged-angled), unbranched or branched distally, (1.4–)2–4.5(–5.3) dm.

erect, unbranched, (2–)2.7–6(–7)dm, usually glabrous, rarely pubescent.

(soon withered), not rosulate.

3 (or 5–7)-foliolate, sometimes simple, 8–25(–38) cm, leaflets petiolulate or subsessile;

petiole (5–)8–25(–32) cm;

lateral leaflets (when present) petiolulate to subsessile, blade similar to terminal, sometimes smaller;

terminal leaflet (petiolule (0.7–)2–5(–11) cm), blade (of simple leaf) ovate to orbicular to broadly cordate or reniform, (1.5–)2.5–7.5(–10) cm × (12–)20–90(–130) mm, base obtuse to cordate, margins entire or dentate to shallowly sinuate, (often with apiculae at veins ending at margin, sometimes minutely pubescent on veins).

3–9, middle ones 5–9-foliolate, petiolate, leaflets petiolulate or subsessile;

petiole 1–3 cm, base not auriculate;

lateral leaflets similar to terminal, blade often smaller, with oblique base, distal leaflets subsessile, blade smaller and narrower distally;

terminal leaflet (petiolule 0.2–0.8 cm), blade usually broadly ovate to narrowly lanceolate, rarely oblong, 0.7–2 cm × 2–10 mm, base cuneate to rounded, margins repand, crenate, or 3-lobed.

2–5, usually 3 (or 5)-foliolate, rarely simple, petiolate, leaflets petiolulate or sessile;

petiole 1–5(–9) cm, base not auriculate;

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

terminal leaflet sessile or petiolulate, blade usually broadly ovate to suborbicular or lanceolate, rarely narrowly oblong, 1–7 cm × (5–)10–47(–65) mm.

ebracteate, (rachis slightly to strongly flexuous or geniculate).

ebracteate.

sepals oblong, 2–3.5 × 0.7–1.2 mm, lateral pair not saccate basally;

petals white, linear, 6–8 × 0.7–1 mm;

filaments: median pairs 4–5 mm, lateral pair 3.5–4 mm;

anthers oblong, 0.7–1 mm.

sepals (erect to ascending), oblong, 3.5–4.5(–5.5) × 1.5–2(–2.5) mm, lateral pair saccate basally;

petals white to pale rose, often broadly obovate, 8–13(–15) × 4–8 mm (clawed, apex rounded);

filaments: median pairs 4–6.5 mm, lateral pair 3–4 mm;

anthers oblong, 1.2–1.7 mm.

horizontal to divaricate or ascending, (3–)4–9(–12) mm.

ascending to divaricate, 10–33(–41) mm.

linear, (2.5–)3–4.6 cm × 1.7–2.1 mm;

ovules 14–22 per ovary;

style 1–3 mm.

linear, 2.2–5.4(–6) cm × 2–3 mm;

ovules 12–22 per ovary;

style 2–5(–6) mm.

dark brown, oblong, 2–2.5 × 0.9–1.2 mm.

dark brown, oblong to broadly ovoid, 1.7–2.8 × 1.2–1.8 mm.

= 32.