Flora of North America species comparison

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

usually few to several, rarely simple from base, erect to ascending or (outer ones) decumbent, branched distally, (0.15–)0.6–3(–3.8) 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).

(later withered);

not rosulate;

petiole (0.4–)1–3.5(–5) cm;

blade spatulate to oblanceolate, lyrate-pinnatifid, pinnatisect, or 2-pinnatifid, (0.7–)1.5–4.5(–7.5) cm × (9–)12–20(–30) mm, margins rarely dentate, (lobes) entire or dentate.

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.

subsessile or petioles 0.8–2.2 cm, blade lanceolate to oblanceolate, (0.7–)1.2–3.3(–5) cm × (2–)4–12 mm, base cuneate, not auriculate, margins subentire to dentate.

elongated in fruit;

rachis glabrous or pubescent, trichomes straight, cylindrical.

often considerably elongated in fruit;

rachis hirsute or hispid, trichomes straight, cylindrical.

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, 1–1.3(–1.5) × 0.5–0.8mm;

petals (sometimes absent), white, oblanceolate to linear, (0.3–)0.6–1.5(–2) × (0.1–)0.2–0.5 mm, claw absent;

stamens 2, median;

filaments 1–1.4 mm;

anthers 0.2–0.3 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 or slightly curved, (often strongly flattened), (1.8–)2–4(–4.6) × 0.2–0.7 mm (to 0.3 mm thick), hirsute to hispid throughout or 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.

ovate to ovate-orbicular, 2.8–4(–4.6) × 2.4–3.6(–4) mm, (base broadly cuneate to rounded), apically winged, apical notch (0.2–)0.3–0.6(–0.7) mm deep;

valves thin, smooth, not veined, hirsute to hispid (on surface or margin);

style obsolete or to 0.1 mm, included in apical notch.

ovate, 1–1.2 × 0.7–0.8 mm.

ovate, 1.4–2.2 × 0.9–1.4 mm.

= 32.