Flora of North America species comparison

several from base, usually erect to ascending, rarely decumbent, branched, 0.4–1.5(–2) dm.

often simple from base, erect, branched (several) distally, (0.8)1.2–4.9(–6) dm.

(soon withered);

not rosulate;

petiole 0.5–1.5(–2) cm;

blade margins entire or pinnatifid (lobes 2–5 pairs, linear to filiform), 1.5–5 cm × 0.5–2 mm.

(often withered at anthesis); rosulate;

petiole 1–3(–4.5) cm;

blade pinnatifid (lobes oblong to ovate or lanceolate), (1.4–)2.2–7(–10) cm, margins (of lobes) dentate-sinuate.

petiolate;

blade linear, 0.1–0.3 cm × 0.5–2 mm, base attenuate, not auriculate, margins entire.

shortly petiolate; 1.5–6 cm × 6–25 mm, base not auriculate, margins (of lobes) entire or dentate.

considerably elongated, (lax) in fruit;

rachis glabrous or puberulent, trichomes straight, cylindrical.

considerably elongated in fruit;

rachis pilose, trichomes straight, cylindrical (to 1 mm) with much smaller, clavate ones, sometimes one type present.

sepals oblong, 0.6–0.8 × 0.4–0.5 mm;

petals absent;

stamens 4, median;

filaments 0.6–0.7;

anthers ca. 0.1 mm.

sepals suborbicular to broadly ovate, 1–1.6 × 0.7–1 mm;

petals white, broadly obovate to suborbicular, 3–4 × 1.2–2.2 mm, claw 0.7–1.3 mm;

stamens 6;

filaments (median pairs) 1–1.6 mm, (glabrous);

anthers 0.4–0.5 mm.

divaricate to horizontal or descending, usually recurved, rarely straight, (terete or slightly flattened), 2–4(–6) × 0.2–0.3 mm, glabrous or puberulent adaxially.

divaricate-ascending to horizontal, straight or slightly recurved, (terete), 4–8(–10) × 0.2–0.3 mm, puberulent or pilose adaxially.

ovate, 2.4–3.6 × 1.8–2.5 mm, apically winged, apical notch (V-shaped), 0.3–0.8 mm deep;

valves thin, smooth, strongly reticulate-veined, glabrous;

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

broadly ovate to orbicular, 2–2.9 × 2–2.8 mm, apically winged, apical notch 0.1–0.2 mm deep;

valves thin, smooth, not veined, glabrous;

style 0.3–0.8 mm, exserted beyond apical notch.

oblong, 1.4–1.8 × 0.8–0.9 mm.

ovate-oblong, 1.3–1.6 × 0.8–1.1 mm.