Flora of North America species comparison

few to several from base, erect to ascending, branched throughout, (0.7–)1–4.8(–6.1) dm.

simple or several from base, erect to decumbent, branched (several) distally, 0.5–2.4(–3.2) dm.

often not rosulate;

petiole 1–6 cm;

blade pinnately lobed, (1–)1.5–8(–11) cm × (5–)10–35 mm, margins (of lobes) entire or denticulate.

(soon withered);

not rosulate;

petiole 0.8–2.5 cm;

blade 1- or 2-pinnatifid, 3–5.6 cm, margins (of lobes) entire or dentate.

sessile;

blade linear, (0.8–)1.3–7(–9.5) cm × (0.7–)1–2(–3) mm, base attenuate, not auriculate, margins entire.

petiolate;

blade pinnatifid (similar to basal), 0.7–2 cm × 2–10 mm, base attenuate to cuneate, not auriculate, margins dentate to incised or pinnately lobed.

elongated in fruit;

rachis puberulent or glabrous.

(paniculate), elongated, (often dense) in fruit;

rachis puberulent, trichomes straight or curved, clavate.

sepals ovate to oblong, 1–2 × 0.8–1 mm;

petals white, suborbicular, 2–3 × 1–2 mm, claw 0.5–1.5 mm;

stamens 6;

filaments 1.5–2 mm, (glabrous);

anthers 0.2–0.4 mm.

sepals (tardily deciduous), oblong, 0.5–0.7 × 0.3–0.4 mm;

petals (absent or rudimentary), white, linear, 0.2–0.4 × 0.05 mm, claw absent;

stamens 2, median;

filaments 0.5–0.8 mm;

anthers 0.1–0.15 mm.

divaricate to horizontal, straight or recurved to somewhat sigmoid, (terete), 3.5–8(–11) × 0.2 mm, glabrous or puberulent adaxially.

ascending to divaricate, straight or slightly recurved, (terete), (1.4–)1.6–2.3(–2.9) × 0.1–0.15 mm, puberulent adaxially.

broadly ovate, 2–3.7(–4.3) × (1.5–)1.8–2.9(–3.4) mm, apically winged, apical notch 0.1–0.3(–0.4) mm deep;

valves thin, smooth, not veined, glabrous;

style 0.2–0.6 mm, exserted beyond apical notch.

ovate-elliptic, 1.7–2.1 × 1.2–1.6 mm, apically winged, apical notch 0.1–0.2 mm deep;

valves thin, smooth, not or weakly veined, glabrous;

style 0.1–0.15 mm, included in or equaling apical notch.

ovate, 1.5–1.8(–2) × 0.9–1.2(–1.5) mm.

oblong, 0.8–1 × 0.5–0.6 mm.

= 32.