Flora of North America species comparison

simple from base, erect, branched distally, (3.5–)4.5–16(–18) dm.

usually few to several, rarely simple from base, erect to ascending or (outer ones) decumbent, branched distally, (0.15–)0.6–3(–3.8) dm.

(soon deciduous), not rosulate;

petiole (1–)2–5.5(–7.5) cm;

blade pinnatifid, (2–)3–6.8(–9) cm × 10–30 mm, margins (of lobes) dentate to serrate.

(later withered);

not rosulate;

petiole (0.4–)1–3.5(–5) cm;

blade spatulate to oblanceolate, lyrate-pinnatifid, pinnatisect, or 2-pinnatifid, (0.7–)1.5–4.5(–7.5) cm × (9–)12–20(–30) mm, margins rarely dentate, (lobes) entire or dentate.

shortly petiolate or sessile;

blade narrowly lanceolate or oblanceolate to linear, 3–7 cm × (2.5–)4–10mm (smaller distally), base attenuate to cuneate, not auriculate, margins usually entire, rarely dentate.

subsessile or petioles 0.8–2.2 cm, blade lanceolate to oblanceolate, (0.7–)1.2–3.3(–5) cm × (2–)4–12 mm, base cuneate, not auriculate, margins subentire to dentate.

elongated in fruit;

rachis puberulent, trichomes straight or curved.

often considerably elongated in fruit;

rachis hirsute or hispid, trichomes straight, cylindrical.

sepals suborbicular to oblong, 0.8–1.5 × 0.7–1.2 mm;

petals white, suborbicular, 2.2–3.5(4) × 1.5–2.5 mm, claw 0.7–1.5 mm;

stamens 6;

filaments 1.5–2.5 mm, (glabrous);

anthers 0.3–0.4 mm.

sepals oblong, 1–1.3(–1.5) × 0.5–0.8mm;

petals (sometimes absent), white, oblanceolate to linear, (0.3–)0.6–1.5(–2) × (0.1–)0.2–0.5 mm, claw absent;

stamens 2, median;

filaments 1–1.4 mm;

anthers 0.2–0.3 mm.

divaricate-ascending to horizontal, usually slightly recurved or somewhat sigmoid, rarely straight, (not winged), (3–)3.5–7.5(–8) × 0.2–0.3 mm, puberulent adaxially.

divaricate-ascending to horizontal, straight or slightly curved, (often strongly flattened), (1.8–)2–4(–4.6) × 0.2–0.7 mm (to 0.3 mm thick), hirsute to hispid throughout or adaxially.

broadly ovate, 2–3.5(–4) × 1.8–2.6(–3) mm, apically winged, apical notch 0.1–0.2mm deep;

valves thin, smooth, not veined, glabrous;

style (0.2–)0.3–0.6(–0.7) mm, exserted beyond apical notch.

ovate to ovate-orbicular, 2.8–4(–4.6) × 2.4–3.6(–4) mm, (base broadly cuneate to rounded), apically winged, apical notch (0.2–)0.3–0.6(–0.7) mm deep;

valves thin, smooth, not veined, hirsute to hispid (on surface or margin);

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

(dark brown), ovate, 1.4–1.8 × 0.8–1.1 mm.

ovate, 1.4–2.2 × 0.9–1.4 mm.