Flora of North America species comparison

(tuberiform, fragile), with ovoid to oblong or cylindrical nodal swellings, slender, 2–5 mm diam., (fleshy).

slender, to 2 mm diam.

erect, unbranched, 0.5–2(–3) dm, glabrous or sparsely pubescent distally.

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

(soon withered), not rosulate.

simple or 3 (or 5)-foliolate, (3–)4–20(–25) cm, leaflets petiolulate or subsessile;

petiole (2–)3–18(–21) cm;

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

terminal leaflet (subsessile or petiolule 0.2–3 cm), blade (simple leaf or terminal leaflet) reniform to suborbicular or ovate to oblong, (0.9–)1.3–4(–5.2) cm × (8–)12–50(–70) mm, base cordate to obtuse, margins crenate, dentate, or 5–7-lobed, (apiculae terminating teeth or lobes, surfaces glabrous).

absent.

1–3, 3 (or 5)-foliolate, (appearing palmate), petiolate, leaflets petiolulate or sessile;

petiole (0.2–)0.5–2(–3) cm, base not auriculate;

lateral leaflets sessile, blade similar to terminal, smaller;

terminal leaflet petiolulate or sessile, blade broadly ovate to oblong or linear, (0.5–)1–3.5(–6) cm, margins usually entire or dentate, rarely lobed.

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, 3.5–5 × 1.5–2 mm, lateral pair saccate basally;

petals usually purple to pale pink, rarely white, obovate, 10–15 × 4–7.5 mm, (not clawed, apex rounded);

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

anthers oblong, 1.5–2 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, 10–35 mm.

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

linear, 2.5–5.6 cm × 2–2.3 mm;

ovules 8–16 per ovary;

style 4–8 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 × 1.4–1.6 mm.

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