Flora of North America species comparison

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

cylindrical, slender (rarely slightly thickened at stem base), 1–3(–4) mm diam.

erect, unbranched, 0.9–3(–4) dm.

erect or decumbent basally, unbranched or branched, (0.6–)1.5–6(–7) dm.

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).

absent.

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.

3–8(–11), 3 or 5-foliolate (rarely only terminal leaflet present), petiolate, leaflets petiolulate or subsessile;

petiole (0.7–)1–4(–6) cm, base not auriculate;

lateral leaflets (when present) subsessile or petiolulate (to 0.4 cm), blade similar to terminal, often much smaller and narrower than terminal;

terminal leaflet (petiolule 0.4–1.6 cm), blade usually ovate to orbicular, rarely subcordate, 1.5–4(–5) cm × 15–35(–50) mm, base truncate, rounded, or cordate, margins crenate, dentate, sinuate, or to 11-lobed.

ebracteate.

ebracteate.

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.

sepals oblong, 2–3(–3.8) × 1–1.5 mm, lateral pair not saccate basally;

petals white, oblanceolate, 3.5–6(–7) × 1.5–2.5(–3) mm (not clawed, apex rounded or ± emarginate);

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

anthers oblong, 0.7–1 mm.

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

ascending to divaricate-ascending, (7–)10–20 mm.

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

ovules 10–14 per ovary;

style 3.5–7 mm.

linear, 1.5–3.5 cm × 1–1.5 mm;

ovules 14–28 per ovary;

style 0.2–1.5(–2.5) mm.

not known.

brown, oblong, 1–1.6 × 0.9–1.1 mm.

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