Flora of North America species comparison

simple from base, erect, branched distally, (1–)2–8(–10) dm.

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

(withered by anthesis);

not rosulate;

petiole 1–4 cm;

blade 1- or 2-pinnatifid or pinnatisect (lobes ovate to oblong), 2–8(–10) cm, margins (of lobes) entire or dentate.

(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 similar to basal, usually less divided, rarely undivided, (distal) often linear, bases not auriculate, margins entire.

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

considerably elongated in fruit;

rachis glabrous.

considerably elongated in fruit;

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

sepals oblong-obovate, 1–1.8 × 0.5–0.8 mm;

petals white or lavender, spatulate to obovate, 2–3.5(–4) × 0.7–1.4 mm, claw 1–1.4 mm;

stamens 6;

filaments (median pairs) 1.5–2 mm, (glabrous);

anthers 0.4–0.5 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.

suberect to ascending, appressed to rachis, straight, (terete or slightly flattened), 1.5–4(–6) × 0.4–0.6 mm, glabrous.

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

broadly ovate or ovate-oblong, (4–)5–6.4(–7) × 3–4.5(–5.6) mm, apically broadly winged, apical notch 0.2 0.8 mm deep;

valves thin, smooth, not veined, glabrous;

style 0.1–0.5(–0.8) mm, usually included in, rarely subequaling, 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.

(reddish brown), ovate-oblong, 2–2.7(–3) × 1–1.5 mm, (3-lobed).

ovate-oblong, 1.3–1.6 × 0.8–1.1 mm.

= 16, 32.