Flora of North America species comparison

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

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

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.

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.

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.

elongated in fruit;

rachis puberulent, trichomes straight or curved.

elongated in fruit;

rachis puberulent, trichomes curved, 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, 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.

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

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.

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.

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

oblong, 1.3–1.4 × 0.7–0.8 mm.