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, 0.5–1.5 mm diam.

erect, unbranched, 0.9–3(–4) dm.

erect, unbranched, (0.6–)1–2(–3) 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).

pinnately 5 or 7-foliolate, (2–)4–10 cm, (not fleshy), leaflets sessile;

petiole (1.5–)3–7(–9) cm;

lateral leaflets similar to terminal, blade sometimes smaller;

terminal leaflet blade linear to narrowly oblong or narrowly lanceolate, (0.5–)1–2.5(–3.3) cm × 0.5–4(–8) mm, base cuneate to attenuate, margins entire.

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.

(1 or) 2 or 3, 5 or 7-foliolate, petiolate, leaflets sessile;

petiole (0.2–)0.5–1.2(–1.5) cm, base not auriculate;

lateral leaflets similar to terminal, blade smaller;

terminal leaflet blade narrowly lanceolate to linear, 1–3.2(–4) cm × 0.8–2.5(–3.5) mm, base cuneate to attenuate, margins entire (apex acute to acuminate).

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 ovate, 2.5–3.5 × 1.5–2.5 mm, lateral pair not saccate basally;

petals white, obovate, 5–9 × 2.5–5 mm (clawed, apex rounded);

filaments: median pairs 3–4.5 mm, lateral pair 1.5–2.5 mm;

anthers oblong, 1–1.5 mm.

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

suberect to divaricate-ascending, (7–)10–25 mm.

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

ovules 10–14 per ovary;

style 3.5–7 mm.

linear, (1.5–)2–4 cm × 1.5–2 mm;

ovules 6–12 per ovary;

style (1–)1.5–2.5(–4) mm.

not known.

brown, oblong, 1.8–2.2 × 0.9–1.1 mm.

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

= 28, 42.