Flora of North America species comparison

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

several from base (caudex), erect or ascending to decumbent, branched distally, 0.5–2.3 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.

not rosulate;

petiole 1–2.5 cm;

blade oblanceolate (rarely with 1 or 2 lateral lobes), 1–3.5 cm × 3–7 mm, margins serrate-dentate.

petiolate;

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

shortly petiolate or sessile;

blade narrowly oblanceolate to linear, 0.7–3.5 cm × 1–4 mm, base attenuate, not auriculate, margins entire or distally serrulate.

considerably elongated in fruit;

rachis glabrous.

elongated in fruit;

rachis puberulent, trichomes curved, cylindrical.

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 oblong, 0.6–0.9 × 0.3–0.4 mm;

petals (absent or rudimentary), white, oblanceolate, 0.3–0.6 × 0.1–0.2 mm, claw absent;

stamens 2, median;

filaments 0.6–0.7 mm;

anthers 0.1–0.2 mm.

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

divaricate to horizontal, slightly recurved, (terete), 2–4(–5.5) × 0.15–0.2 mm, densely puberulent throughout.

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.

elliptic, 2.4–2.8 × 1.6–2 mm, apically winged, apical notch 0.2–0.3 mm deep;

valves thin, smooth, not veined, puberulent (at least along margin);

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

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

oblong, 1.3–1.4 × 0.7–0.8 mm.

= 16, 32.