Flora of North America species comparison

absent.

cylindrical, 3–6 mm diam., (distinctly constricted at intervals, non-uniform diam., fleshy, slightly fragile, with dentate leaf scars).

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

erect, unbranched, 0.9–3(–4) dm.

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

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).

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.

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.

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 (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.

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

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

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

ovules 10–14 per ovary;

style 3.5–7 mm.

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

not known.

= 16.

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