Flora of North America species comparison

few to several from base, erect to ascending or decumbent, branched distally, 1–4.5(–7) dm.

simple from base (caudex branch), erect, branched distally, 1–7.5 dm.

(soon withered);

not rosulate;

petiole 0.5–4(–6) cm;

blade 1- or 2-pinnatisect, 1–6(–8) cm, margins (of lobes) entire or dentate (sometimes deeply lobed).

rosulate;

petiole (1.5–)2.5–10(–13) cm;

blade oblong to lanceolate, (2.5–)4.5–9(–14) cm × 15–40 mm, margins entire.

shortly petiolate to subsessile;

blade similar to basal, smaller and less divided distally, lobes lanceolate to oblong or elliptic, 1.5–3.5(–4.5) cm ×5–12 mm, base not auriculate, margins (of lobes) entire, serrate, or incised.

shortly petiolate;

blade oblanceolate, (much smaller than basal), base attenuate-cuneate, not auriculate, margins entire.

elongated in fruit;

rachis glabrous or pubescent, trichomes straight, cylindrical.

(paniculate), considerably elongated in fruit.

sepals (tardily deciduous), ovate, 0.5–0.7(–0.9) mm;

petals white, elliptic to linear, 0.4–0.5 × ca. 0.1 mm, claw absent;

stamens 2, median;

filaments 0.3–0.6 mm;

anthers 0.1–0.2 mm.

sepals oblong, 2.5–3(–4) × 1.2–1.8 mm;

petals creamy white to pale yellow, obovate to oblanceolate, 4–5.5(–6.5) × 2–3.3 mm, claw 1.5–2.2 mm;

stamens 6;

filaments (median pairs) 3.5–4.5 mm;

anthers 1–1.2 mm.

divaricate to horizontal, straight slightly recurved, (terete), 1.4–2.5(–4) × 0.15–2 mm, glabrous or sparsely pubescent adaxially.

divaricate-ascending, straight, (terete), 8–15 × 0.4–0.5 mm.

schizocarpic, didymous, 1.3–1.7 × 2–2.5 mm, apically not winged, apical notch 0.2–0.4 mm deep;

valves thick, rugose, strongly veined, glabrous;

style absent or obsolete, included in apical notch.

obovate to somewhat rhomboid, 7–11 × 5–6.5 mm, apically not winged, apical notch absent;

valves thin, smooth, obscurely veined;

style 0.2–0.6 mm.

ovate, 1–1.2 × 0.7–0.8 mm.

oblong, 3.7–4.5 × 1.6–2 mm.

= 32.