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, erect, branched distally, (2–)3–8(–11) 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 (on sterile shoots);

petiole (1.5–)2.5–8(–10) cm;

blade oblanceolate to spatulate, (2–)3–7(–9) cm × 5–23(–32) mm, margins crenate to serrate-crenate.

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 oblong to oblanceolate, 1–3.5 cm × 4–15 mm, base cuneate, not auriculate, margins entire.

elongated in fruit;

rachis glabrous or pubescent, trichomes straight, cylindrical.

(subcorymbose panicles), slightly elongated in fruit;

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 oblong to ovate, (1–)1.3–1.8(–2) × 0.9–1.2 mm;

petals white, suborbicular to broadly obovate, (1.8–)2–3 × 1.3–2 mm, claw 0.5–1 mm;

stamens 6;

filaments 1.4–1.6 mm, (glabrous);

anthers 0.5–0.7 mm.

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

divaricate-ascending to horizontal, straight, (terete), 3–6(–8) × 0.2–0.25 mm, puberulent adaxially.

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.

broadly ovate, (2.5–)3–3.5(–4) × (2–)2.3–2.8 mm, apically winged, apical notch 0.1–0.2mm deep;

valves thin, smooth, not veined, glabrous;

style 0.2–0.6 mm, exserted beyond apical notch.

ovate, 1–1.2 × 0.7–0.8 mm.

ovate, 1.5–2 × 1–1.3 mm.

= 32.