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, unbranched or branched (few) distally, (0.2–)0.5–1(–1.4) 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).

(often deciduous);

not rosulate;

blade spatulate to oblanceolate, 1–2.5(–3.2) cm × 2–6(–9) mm, margins entire or apically 3(–5)-toothed or -lobed.

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.

sessile;

blade usually oblanceolate or oblong, rarely obovate, (0.8–)1.3–2.5 cm × (2–)4–7 mm, base obtuse or cuneate, not auriculate, margins entire or apically 3(–5)-toothed.

elongated in fruit;

rachis glabrous or pubescent, trichomes straight, cylindrical.

slightly elongated in fruit;

rachis puberulent, trichomes straight or curved.

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 oblong-ovate, 1.2–2 × 1–1.5 mm;

petals white, obovate, 2–3.2(–4) × 1.5–2 mm, claw 0.5–1 mm;

stamens 6;

filaments 1.7–2.3 mm, (glabrous);

anthers 0.4–0.7 mm.

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

divaricate-ascending, straight, (slender or slightly stout, terete), (2.5–)3–4.2(–5) × 0.4–0.5mm, usually puberulent throughout, rarely glabrate.

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.

suborbicular to broadly ovate, (2.5–)3–4.3(–5) × (2–)2.3–4 mm, apically winged, apical notch 0.1–0.4 mm deep;

valves thin, smooth, not veined, glabrous or sparsely puberulent;

style 0.5–1 mm, exserted beyond apical notch.

ovate, 1–1.2 × 0.7–0.8 mm.

oblong-ovate, (1.8–)2–2.3 × 1–1.2 mm.

= 32.

= 32.