Flora of North America species comparison

emersed or submersed; submersed leaves mostly absent;

petiole terete to triangular, 2–36 cm;

blade with translucent markings present as distinct lines, elliptic, lanceolate, or ovate, 2.6–15.5 ´ 0.5–20 cm, base truncate or occasionally cordate to tapering.

racemes, rarely panicles, of 1–9 whorls, each 1–3(–4)-flowered, erect, 1.5–40 ´ 1.7–50 cm, not proliferating;

peduncles 3–5-ridged, 2.1–57 cm;

rachis triangular;

bracts distinct, lanceolate, 0.3–2.5 cm, coarse, margins scarious;

pedicels spreading to ascending, 0.6–2.8 cm.

6–11 mm wide;

sepals spreading to recurved, 9–13-veined, veins not papillate;

petals clawed;

stamens 9–15;

anthers versatile;

pistils 45–200.

oblanceolate, plump, 3–5-ribbed, abaxially 2-keeled, 0.9–3.2 ´ 0.6–2.5 mm;

glands 1–2;

beak terminal, 0.6–1.3 mm.

= 22.