Flora of North America species comparison

absent.

slender, 0.5–1 mm diam.

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

erect to ascending, branched, 1.5–2 dm.

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

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, 3- or 5-foliolate, petiolate, leaflets petiolulate;

petiole 0.5–1.7 cm, base not auriculate;

lateral leaflet blade linear to linear-lanceolate, 0.9–1.5 cm × 1–3 mm, margins entire;

terminal leaflet (petiolule 0.3–0.5 cm), blade obovate to lanceolate (linear distally), 1.3–2.3 cm × 2–8 mm, base cuneate, margins entire or subapically 1- or 2-toothed.

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, 1.2–1.5 × 0.6–0.8 mm, lateral pair not saccate basally;

petals white, oblanceolate, 2–2.5 × 0.8–1 mm, (not clawed, apex rounded);

filaments: median pairs 1.5–1.8 mm, lateral pair 1–1.2 mm;

anthers ovate, 0.2–0.3 mm.

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

ascending to suberect, 5–14 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, 1–2 cm × ca. 1 mm;

ovules 16–24 per ovary;

style 0.5–0.7 mm.

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

brown, oblong, 1.2–1.5 × 0.8–1 mm.

and basal leaves absent.

= 16.