Flora of North America species comparison

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

simple from base (caudex branch), erect, branched distally, 1–7.5 dm.

(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.

rosulate;

petiole (1.5–)2.5–10(–13) cm;

blade oblong to lanceolate, (2.5–)4.5–9(–14) cm × 15–40 mm, margins entire.

sessile;

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

shortly petiolate;

blade oblanceolate, (much smaller than basal), base attenuate-cuneate, not auriculate, margins entire.

elongated, (dense) in fruit;

rachis hirsute, trichomes straight, cylindrical.

(paniculate), considerably elongated in fruit.

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.

sepals oblong, 2.5–3(–4) × 1.2–1.8 mm;

petals creamy white to pale yellow, obovate to oblanceolate, 4–5.5(–6.5) × 2–3.3 mm, claw 1.5–2.2 mm;

stamens 6;

filaments (median pairs) 3.5–4.5 mm;

anthers 1–1.2 mm.

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.

divaricate-ascending, straight, (terete), 8–15 × 0.4–0.5 mm.

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.

obovate to somewhat rhomboid, 7–11 × 5–6.5 mm, apically not winged, apical notch absent;

valves thin, smooth, obscurely veined;

style 0.2–0.6 mm.

ovate, 1.2–1.8 × 0.8–1.2 mm.

oblong, 3.7–4.5 × 1.6–2 mm.