Flora of North America species comparison

several from base, usually erect to ascending, rarely decumbent, branched, 0.4–1.5(–2) dm.

simple from base, erect, unbranched or branched (few) distally, (0.2–)0.5–1(–1.4) dm.

(soon withered);

not rosulate;

petiole 0.5–1.5(–2) cm;

blade margins entire or pinnatifid (lobes 2–5 pairs, linear to filiform), 1.5–5 cm × 0.5–2 mm.

(often deciduous);

not rosulate;

blade spatulate to oblanceolate, 1–2.5(–3.2) cm × 2–6(–9) mm, margins entire or apically 3(–5)-toothed or -lobed.

petiolate;

blade linear, 0.1–0.3 cm × 0.5–2 mm, base attenuate, not auriculate, margins entire.

sessile;

blade usually oblanceolate or oblong, rarely obovate, (0.8–)1.3–2.5 cm × (2–)4–7 mm, base obtuse or cuneate, not auriculate, margins entire or apically 3(–5)-toothed.

considerably elongated, (lax) in fruit;

rachis glabrous or puberulent, trichomes straight, cylindrical.

slightly elongated in fruit;

rachis puberulent, trichomes straight or curved.

sepals oblong, 0.6–0.8 × 0.4–0.5 mm;

petals absent;

stamens 4, median;

filaments 0.6–0.7;

anthers ca. 0.1 mm.

sepals suborbicular to oblong-ovate, 1.2–2 × 1–1.5 mm;

petals white, obovate, 2–3.2(–4) × 1.5–2 mm, claw 0.5–1 mm;

stamens 6;

filaments 1.7–2.3 mm, (glabrous);

anthers 0.4–0.7 mm.

divaricate to horizontal or descending, usually recurved, rarely straight, (terete or slightly flattened), 2–4(–6) × 0.2–0.3 mm, glabrous or puberulent adaxially.

divaricate-ascending, straight, (slender or slightly stout, terete), (2.5–)3–4.2(–5) × 0.4–0.5mm, usually puberulent throughout, rarely glabrate.

ovate, 2.4–3.6 × 1.8–2.5 mm, apically winged, apical notch (V-shaped), 0.3–0.8 mm deep;

valves thin, smooth, strongly reticulate-veined, glabrous;

style obsolete or to 0.1 mm, included in apical notch.

suborbicular to broadly ovate, (2.5–)3–4.3(–5) × (2–)2.3–4 mm, apically winged, apical notch 0.1–0.4 mm deep;

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

style 0.5–1 mm, exserted beyond apical notch.

oblong, 1.4–1.8 × 0.8–0.9 mm.

oblong-ovate, (1.8–)2–2.3 × 1–1.2 mm.

= 32.