Flora of North America species comparison

simple from base, erect, branched distally, (2–)3.5–12(–15) dm.

few to several from base, erect to ascending, or (outer ones) decumbent, unbranched, (0.15–)0.3–1.3(–2.1) dm.

not rosulate;

petiole 1–9(–14) cm;

blade elliptic-ovate to oblong, (2–)3.5–15(–25) cm × (5–)15–50(–80) mm, (leathery), margins entire or serrate.

(soon withered);

not rosulate;

petiole 0.5–2 cm;

blade pinnatifid to pinnatisect (lobes linear to narrowly oblong), (1.5–)2.2–5.7(–7) cm × (0.5–)1–2(–3) mm, margins entire.

sessile or shortly petiolate;

blade oblong to elliptic-ovate or lanceolate, (1–)2–9(–12) cm × 3–45 mm, base cuneate, not auriculate, margins serrate or entire.

sessile;

blade usually linear, rarely with linear lobes, 1–5 cm × 0.5–2 mm, base attenuate, not auriculate, margins entire.

(subcorymbose panicles), slightly elongated or not in fruit;

rachis glabrous or sparsely puberulent, trichomes straight, cylindrical.

elongated, (dense) in fruit;

rachis hirsute, trichomes straight, cylindrical.

sepals suborbicular to ovate, 1–1.4 × 0.8–0.9 mm;

petals white, obovate, 1.8–2.5 × (0.8–)1–1.3 mm, claw 0.7–1 mm;

stamens 6;

filaments 0.9–1.4 mm, (glabrous);

anthers 0.4–0.5 mm.

sepals oblong to ovate, 0.7–1.1 × 0.2–0.6 mm;

petals absent;

stamens 4, median;

filaments 0.5–1 mm;

anthers ca. 0.1 mm.

ascending to divaricate, straight or slightly curved, (terete), 2–5(–6) × 0.1–0.2 mm, glabrous or puberulent adaxially.

erect to slightly ascending, straight and appressed to rachis or distally slightly recurved, (strongly flattened), (1.6–)1.9–2.5(–3) × 0.4–0.8 mm (width proximal to apex), usually hirsute or, rarely, only adaxially.

oblong-elliptic to broadly ovate or suborbicular, (1.6–)1.8–2.4(–2.7) × 1.3–1.8 mm, apically not winged, apical notch 0(–0.1) mm deep;

valves thin, smooth, not veined, glabrous or sparsely pilose;

style 0.05–0.15 mm, exserted beyond apical notch (when present).

ovate, 2.5–3.5 × 2–2.8 mm, apically winged, apical notch (closed, often U-shaped), 0.5–0.7(–0.8) mm deep;

valves thin, smooth, strongly reticulate-veined, usually hirsute, rarely glabrous;

style absent or obsolete, included in apical notch.

oblong, (0.8–)1–1.2 × 0.6–0.9 mm.

ovate, 1.2–1.8 × 0.8–1.2 mm.

= 24.