Flora of North America species comparison

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

absent.

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

(simple or few to several from base), erect, (somewhat flexuous), often branched distally, (0.5–)1–3(–4) dm.

(often withered by anthesis), usually not rosulate, pinnately (5 or) 7–13(–17)-foliolate, (2–)4–10cm, leaflets sessile or petiolulate;

petiole 0.5–2.5(–4.5) cm;

lateral leaflets similar to terminal, sometimes smaller;

terminal leaflet (sessile or petiolule to 0.5 cm), blade linear to oblong, oblanceolate to obovate, or suborbicular, (0.1–)0.3–1 cm × 1–7 mm, base cuneate, margins entire or 3(–5)-toothed or -lobed.

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).

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).

5–10(–14), (5–)9–15(–17)-foliolate, petiolate, leaflets sessile;

petiole 0.3–1 cm, base not auriculate;

lateral leaflets similar to terminal, sometimes smaller;

terminal leaflet blade filiform, linear, or narrowly oblong, 0.3–1(–1.6) cm × 0.3–3 mm, margins usually entire, rarely 1–3-toothed.

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 oblong, 1–1.5(–2) × 0.3–0.5 mm, lateral pair not saccate basally, (margins membranous);

petals white, oblanceolate, (1.5–)1.8–2.5(–3) × 0.4–0.8(–1) mm;

filaments 1.4–2.5 mm;

anthers ovate, 0.2–0.4 mm.

ascending to divaricate-ascending, 7–20 mm.

divaricate or ascending, 4–10 mm.

linear, 1.5–2.5 cm × 1–1.2 mm;

ovules 10–14 per ovary;

style 1.2–2.5 mm.

linear, (torulose), (0.5–)1–2(–2.5) cm × 0.6–0.9 mm;

ovules 20–50 per ovary;

style 0.3–0.7(–1) mm.

brown, oblong, 1.2–1.7 × 0.8–1.1 mm.

pale brown, oblong-ovoid, 0.6–0.9 × 0.4–0.6 mm, (narrowly margined or not).

= 16.