Flora of North America species comparison

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

few to several from base, prostrate or decumbent, branched, (0.2–)0.4–3(–4.6) 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;

petiole (0.3–)0.6–2.5(–3.2) cm;

blade spatulate to oblanceolate or linear, pinnatifid or lobed (lobes 3–9 pairs, ovate to oblong), (0.7–)1.3–5.2(–6) cm × 3–8 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.

petioles 0.1–0.5 cm;

blade obovate to spatulate or oblanceolate, (0.6–)1–1.8(–2.3) cm × 2–8(–14) mm, base attenuate-cuneate, not auriculate, margins dentate-sinuate to crenate orentire.

elongated in fruit;

rachis glabrous or pubescent, trichomes straight, cylindrical.

(corymbose to subcapitate), slightly elongated in fruit;

rachis glabrous.

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 obovate-oblong, 1–2 × 0.6–1 mm;

petals yellow (rarely creamy white at early anthesis), spatulate, (1.8–)2–2.8(–3) × 0.6–1 mm, claw 0.5–1 mm;

stamens 6;

filaments (median pairs) 1.2–2 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 sigmoid, (terete), (2.7–)3–4.4(–5) × 0.2–0.3 mm, glabrous.

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.

usually narrowly to broadly ovate, rarely suborbicular, (2.2–)2.5–3.8(–4.2) × (1.6–)2.2 3.2(–3.5) mm, apically divergently winged, apical notch 0.2–0.6 mm deep;

valves thin, smooth, moderately reticulate-veined, usually glabrous, rarely pubescent;

style 0.7–1.6 mm, exserted beyond apical notch.

ovate, 1–1.2 × 0.7–0.8 mm.

ovate, 1–1.6 × 0.6–0.9 mm.

= 32.

= 32.