Flora of North America species comparison

often simple from base, erect, branched distally, (1.5–)2–6.7(–9.4) dm.

simple or several from base, erect to ascending or (outer ones) decumbent, unbranched or branched, 0.2–1.5(–3.8) dm.

(later withered); rosulate;

petiole (0.7–)1.5–4.5 cm;

blade pinnatifid, 2–8.3 cm × 9–26 mm, margins (of lobes) entire or dentate.

(soon withered);

not rosulate;

petiole often undifferentiated (to 3 cm);

blade linear, 2–10 cm × 1–4 mm, margins entire, dentate, or pinnatisect (lobes 2–10 pairs, margins entire or dentate).

shortly petiolate;

blade oblanceolate to nearly linear, 1–4.5(–6.2) cm × 3–10(–17) mm, base attenuate to cuneate, not auriculate, margins entire or dentate.

similar to basal, smaller, blade base attenuate, not auriculate, margins entire.

much-elongated in fruit;

rachis pubescent, trichomes curved, with fewer and longer, straight ones.

(subcapitate to cylindrical), elongated or not in fruit, (compact);

rachis puberulent, trichomes straight, cylindrical.

sepals oblong, 0.8–1 × 0.2–0.4 mm;

petals (sometimes absent), white, oblanceolate, 0.4–1.6 × 0.1–0.8 mm, claw absent;

stamens 2, median;

filaments 0.8–1 mm;

anthers 0.1–0.2 mm.

sepals (somewhat persistent), ovate, 1.1–1.4 × 0.6–0.8 mm;

petals greenish, obovate-oblong, 1.9–3 × 0.8–1.3 mm, claw absent, (usually pubescent outside, with fringed margin, rarely glabrescent);

stamens 4, median;

filaments 0.8–1.1 mm;

anthers 0.15–0.2 mm.

usually divaricate, rarely horizontal, straight or slightly recurved, (terete), (2.5–)3–4.1(–4.7) × 0.2 mm, puberulent adaxially.

erect to slightly ascending, straight and appressed to rachis or distally slightly recurved, (strongly flattened), 2.5–5 × 0.9–1.4 mm, usually puberulent throughout, rarely only adaxially.

elliptic-obovate to obovate-orbicular, 2.4–3.2 × 1.8–2.5 mm, apically winged, apical notch 0.2–0.5 mm deep;

valves thin, smooth, not veined, sparsely puberulent, (trichomes often antrorsely appressed, sometimes restricted to margin);

style 0.05–0.1 mm, included in apical notch.

oblong-ovate, 5–7 × 2.8–4 mm, apically winged, apical notch 1.4–2.8 mm deep;

valves thick, smooth, strongly reticulate-veined, hirsute and puberulent, (trichomes spreading, mixed with smaller ones);

style obsolete, included in apical notch.

ovate, 1.4–1.6 × 0.7–0.9 mm.

oblong, 2–2.4 × 1.1–1.3 mm.