Flora of North America species comparison

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

several from base, erect to ascending, branched distally, (1.8–)3–6(–7) 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).

not rosulate;

petiole 1–3 cm;

blade ovate to lanceolate, pinnatifid, 1–4.5 cm × 8–25 mm, margins (of lobes) 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 or sessile;

blade lanceolate to oblanceolate, 1.8–3.5 cm × 3–10 mm (smaller distally), base cuneate, not auriculate, margins entire or coarsely serrate.

elongated in fruit;

rachis glabrous or pubescent, trichomes straight, cylindrical.

(subcorymbose panicles), individual racemes slightly elongated;

rachis puberulent, trichomes straight.

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 suborbicular to broadly ovate, 1.2–2 × 1.2–1.5 mm;

petals white, suborbicular to obovate, 2–3.2 × 1.5–2 mm, claw 0.5–1 mm;

stamens 6;

filaments 1.4–1.7 mm, (glabrous);

anthers 0.4–0.5 mm.

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

divaricate to horizontal, straight or slightly curved, (not winged), 4–7 × 0.2 mm, puberulent throughout.

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.

often broadly obovate, 2–3.3 × 1.8–2.5 mm, apically winged, apical notch 0.1–0.2 mm deep;

valves thin, smooth, not veined, glabrous;

style 0.2–0.8 mm, exserted beyond apical notch.

ovate, 1–1.2 × 0.7–0.8 mm.

ovate, 1.4–1.6 × 0.8–1 mm.

= 32.