Flora of North America species comparison

swollen, compact at stem base, (fleshy, stolons many, slender, ca. 1 mm diam., pubescent or glabrous).

cylindrical, slender, 0.5–1.5 mm diam.

erect, usually unbranched, rarely branched distally, 1–2.5 dm, sparsely to densely hirsute or pilose proximally, sparsely so or glabrous distally.

erect, unbranched, (0.6–)1–2(–3) dm.

usually simple, rarely 3-foliolate, (3–)6–16 cm, leaflets petiolulate or subsessile;

petiole (1.5–)4–13 cm;

lateral leaflets subsessile or petiolulate (to 0.5 cm), blade similar to terminal, much smaller;

terminal leaflet (petiolule 0.5–2 cm), blade orbicular to reniform or broadly ovate, (1–)1.5–4.5 cm, base cordate, margins repand to coarsely crenate, (apiculate at vein endings, surfaces sparsely pubescent or glabrous).

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.

2–5, 3 or 5-foliolate, petiolate, leaflets petiolulate or subsessile;

petiole 0.8–5 cm, base not auriculate;

lateral leaflets sessile or petiolulate (to 0.5 cm), blade similar to terminal, smaller;

terminal leaflet petiolulate (0.5–1.5 cm), blade broadly ovate to suborbicular, 1.5–4(–5) cm × 12–35 mm, margins repand to coarsely crenate or slightly lobed, (apiculate at vein endings, margins glabrous).

(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 (ascending) oblong, 3–3.5 × 1–1.5 mm, lateral pair not saccate basally;

petals white, oblanceolate, 5–6.5(–8) × 1.5–2.5 mm, (not clawed, apex obtuse to subemarginate);

filaments: median pairs 3.5–5 mm, lateral pair 2.5–3 mm;

anthers oblong, 1.2–1.6 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.

ascending to divaricate-ascending, 7–20 mm.

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

linear, 1.5–2.5 cm × 1–1.2 mm;

ovules 10–14 per ovary;

style 1.2–2.5 mm.

linear, (1.5–)2–4 cm × 1.5–2 mm;

ovules 6–12 per ovary;

style (1–)1.5–2.5(–4) mm.

brown, oblong, 1.2–1.7 × 0.8–1.1 mm.

brown, oblong, 1.8–2.2 × 0.9–1.1 mm.

= 28, 42.