Flora of North America species comparison

cylindrical, slender, 1–3 mm diam.

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

erect, unbranched or rarely branched distally, (0.8–)1–2.5(–3.5) dm.

erect, unbranched, 0.9–3(–4) dm.

simple or 3-foliolate, (1.5–)3–8 cm, leaflets petiolulate or subsessile;

petiole (1–)2–6 cm;

lateral leaflets subsessile, blade similar to terminal, much smaller;

terminal leaflet petiolulate (to 1 cm), blade reniform to cordate, (0.5–)1–2 cm, base cordate, margins entire or 3-lobed.

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).

3–7, 3-foliolate (or distalmost simple), petiolate, leaflets petiolulate or sessile;

petiole 0.7–3.5 cm, base auriculate (auricle 0.7–5 mm);

lateral leaflets sessile or petiolulate (to 0.5 cm), blade oblong to ovate or oblong;

terminal leaflet (petiolule 0.5–1 cm), blade broadly ovate to suborbicular or reniform, 1.5–4 cm × 15–35 mm, margins often 3 or 5-lobed (lobe apex minutely apiculate, glabrous on margin).

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, 2.5–3 × 1–1.5 mm, lateral pair not saccate basally;

petals white, oblanceolate, 6–8 × 2–3 mm (not clawed, apex obtuse to subemarginate);

filaments: median pairs 3.5–4 mm, lateral pair 2–2.5 mm;

anthers ovate, ca. 0.7 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.

divaricate-ascending, (7–)10–17 mm.

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

linear, (1.5–)2–3.5(–4) cm × 1.3–1.7 mm;

ovules 10–16 per ovary;

style 2–4 mm.

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

ovules 10–14 per ovary;

style 3.5–7 mm.

brown, oblong, 1.7–2 × 1–1.2 mm.

not known.

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