Flora of North America species comparison

absent.

cylindrical, slender, to 2 mm diam.

erect, (angled, sometimes flexuous), unbranched basally, usually branched distally, (1.2–)2–6.5(–9) dm.

erect, unbranched, (1.5–)2.5–8.5(–10) dm, sparsely to densely hirsute at base.

(often withered by flowering), rosulate, similar to cauline, with fewer distal leaflets.

3 (or 5)-foliolate, (4–)7–20(–22) cm, leaflets petiolulate or subsessile;

petiole (2–)4–12(–14) cm;

lateral leaflets subsessile, blade similar to terminal, larger or smaller in size;

terminal leaflet petiolulate [(0.3–)0.5–1.5 cm], blade ovate to broadly lanceolate, 1.5–7(–9) cm, base usually cuneate, rarely subreniform or obtuse, margins 3–5(–7)-lobed or -toothed, surfaces puberulent.

9–24, (9–)13–25-foliolate, petiolate, leaflets petiolulate;

petiole 2–6 cm, base auriculate (auricles to 10 × 2.2 mm);

lateral leaflets similar to terminal, blade often smaller;

terminal leaflet (petiolule to 0.5 cm), blade orbicular, obovate, ovate, or lanceolate, 1–4(–5) cm × 5–17 mm, margins entire or 3–5(–9)-toothed or -lobed.

(3 or) 4–8, 3 (or 5)-foliolate, petiolate, leaflets petiolulate or sessile;

petiole 1–4 cm, base not auriculate;

lateral leaflets sessile, blade similar to terminal, smaller, margins usually dentate, rarely entire;

terminal leaflet sessile or petiolulate, blade broadly ovate to narrowly lanceolate, 2–7 cm × 6–40 mm, margins minutely pubescent.

ebracteate.

ebracteate.

sepals oblong, 1.2–2(–2.5) × 0.7–1(–1.2) mm, lateral pair not saccate basally;

petals (rarely absent), white, oblanceolate, 1.5–4(–5) × 0.6–1.2 mm;

filaments 2–3(–4) mm;

anthers ovate, 0.3–0.5 mm.

sepals oblong, 2.5–4 × 1.3–2 mm, lateral pair saccate basally;

petals usually white, rarely pinkish, obovate, 8–15 × 4–8 mm (clawed, apex rounded or emarginate);

filaments: median pairs 3.5–6 mm, lateral pair 2–3.5 mm;

anthers oblong, 0.8–1.2 mm.

divaricate or ascending, 3.5–12(–15) mm.

ascending to divaricate, (9–)12–25 mm.

linear, (torulose), (1–)1.6–3(–3.5) cm × 0.9–1.5 mm; (valves glabrous or, rarely, pilose);

ovules 10–30 per ovary;

style 0.6–1.6(–2) mm.

linear, 1.5–3.2 cm × 1.4–2 mm;

ovules 10–16 per ovary;

style (0.5–)1–4 mm.

brown, oblong, 1.1–1.5 × 0.8–1 mm, (compressed, sometimes narrowly winged apically).

dark brown, oblong, 1.8–2.3 × 1–1.2 mm.

= 16.

= 40.