Flora of North America species comparison

often simple from base, erect or decumbent basally, branched (several) distally, (0.8–)2–6.5(–9) dm.

simple to numerous from base, erect to ascending or decumbent, sometimes branched distally, (0.4–)1–3.5(–4.2) dm.

(early withered);

not rosulate;

petiole 1–4 cm;

blade obovate, spatulate, or ovate, (1.5–)3–10(–15) cm × 10–40 mm, margins sinuate to dentate or entire.

(soon withered);

not rosulate;

petiole (0.4–)1–4.2(–5) cm;

blade pinnatisect (lobes usually linear to filiform, rarely oblong to lanceolate), (0.8–)1.5–7.3(–8) cm, margins (of lobes) usually entire, rarely dentate.

sessile;

blade ovate, elliptic, oblong, or lanceolate, oblanceolate, or obovate, (1–)3–9(–15) cm × (5–)10–20(–50) mm, base sagittate-amplexicaul or auriculate, margins dentate or entire, (surfaces pubescent or glabrous).

petiolate or subsessile;

similar to basal, blade smaller, sometimes undivided and linear, base attenuate, not auriculate.

(corymbose panicles), slightly or considerably elongated in fruit;

rachis glabrous or puberulent, trichomes straight or curved, cylindrical.

much-elongated, (lax) in fruit;

rachis puberulent to hirsutulous, trichomes straight, cylindrical.

sepals oblong to ovate, 1.5–2.5 × 0.7–1.2 mm;

petals white, obovate, (2.5–)3–4(–4.5) × (1–)1.3–2(–2.2) mm, claw 1–1.7 mm;

stamens 6;

filaments 2–3 mm, (glabrous);

anthers 0.4–0.5 mm.

sepals oblong-ovate, (0.7–)0.9–1.3(–1.5) × 0.5–0.8 mm;

petals (rarely rudimentary or absent), white, oblanceolate, (0.8–)1.2–2(–2.8) × 0.2–1(–1.6) mm, claw absent, (glabrous);

stamens usually 4, median, rarely 6;

filaments (0.5–)0.7–1(–1.3);

anthers 0.1–0.2 mm.

ascending to horizontal, straight, (terete), 5–10(–15) × 0.2–0.3 mm, glabrous or sparsely puberulent adaxially.

usually divaricate, rarely ascending or suberect, usually slightly or weakly recurved, rarely straight, (strongly flattened), 2.5–5(–6.5) × (0.4–)0.6–0.9(–1.1) mm, puberulent adaxially and sometimes on proximal 1/3 abaxially.

(indehiscent), cordate to subreniform, (2–)2.5–3.7(–4.3) × (3.2–)3.7–5(–5.6) mm, apically (obtuse to subacute), not winged, apical notch absent;

valves thin, smooth, reticulate-veined, glabrous;

style (0.6–)1–1.8(–2) mm.

orbicular to broadly ovate, (2.5–)3–5.5(–6.5) × (2–)2.6–5(–5.4) mm, apically winged, apical notch 0.3–0.7(–1) mm deep;

valves thin, smooth, slightly veined or not, usually glabrous, rarely minutely and sparsely puberulent (along margin);

style usually obsolete, rarely to 0.1 mm, included in apical notch.

ovate, 1.5–2.3 × 1–1.3 mm.

ovate-oblong, 1.6–2.6 × 0.9–1.2 mm.

= 32, 64.