Flora of North America species comparison

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

cylindrical, 3–6 mm diam., (distinctly constricted at intervals, non-uniform diam., fleshy, slightly fragile, with dentate leaf scars).

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

erect, unbranched, 0.9–3(–4) dm.

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).

3-foliolate, 7–20 cm, leaflets petiolulate or subsessile;

petiole 4–15 cm;

lateral leaflets subsessile or petiolulate, blade often similar to terminal, base often oblique;

terminal leaflet (petiolule 0.2–1(–1.7) cm), blade broadly ovate to oblong, 2–7.5 cm × 12–37 mm, base cuneate to obtuse, margins coarsely dentate to sharply incised, or deeply cleft into 2 or 3 lobes (lobes dentate or incised, margins puberulent).

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.

2 or 3, 3-foliolate, (rarely subopposite), petiolate, leaflets petiolulate or subsessile;

petiole (0.5–)1–4(–6.5) cm, base not auriculate;

lateral and terminal leaflets similar to rhizomal, distalmost sometimes much 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 (erect to ascending), oblong, 5–7 × 2–3 mm, lateral pair slightly saccate basally;

petals white or pink, oblanceolate, 10–17 × 3–6 mm, (not clawed, apex rounded);

filaments: median pairs 4–8 mm, lateral pair 3–6.5 mm;

anthers linear, 1.7–2.7 mm.

ascending to divaricate, 10–35 mm.

(flowering ones) horizontal to divaricate or deflexed, 7–20 mm.

linear, 2.5–5.6 cm × 2–2.3 mm;

ovules 8–16 per ovary;

style 4–8 mm.

(undeveloped), linear-lanceolate, to 3 cm × 2 mm;

ovules 10–14 per ovary;

style 3.5–7 mm.

dark brown, oblong, 2–2.5 × 1.4–1.6 mm.

not known.

= 120, 124, 132, 138, 156, 161, ca. 208.