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.

(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;

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

elongated, (dense) in fruit;

rachis hirsute, trichomes straight, cylindrical.

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.

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.

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.

ovate, 1.2–1.8 × 0.8–1.2 mm.