Flora of North America species comparison

emersed or submersed, phyllodial or rarely dilated apically, flattened, 4–40 cm × 0.05–0.4(–0.5) cm.

emersed;

petiole terete, 44–58 cm;

blade linear to ovate or elliptic, 20.3–35 × 0.7–16 cm.

racemes, of 1–5 whorls, emersed, 2–20 × 1.5–12 cm;

peduncles 7–59 cm;

bracts connate more than or equal to ¼ total length, oblanceolate, 0.2–0.3 mm, delicate, not papillose; fruiting pedicels spreading, cylindric, 0.5–6 cm.

racemes or panicles, of 6–13 whorls, emersed, 16–72 × 19–60 cm;

peduncles 75–125.5 cm;

bracts connate more than or equal to ¼ total length, lanceolate to ovate-lanceolate, 3–32 mm, coarse, papillose or not; fruiting pedicels spreading, cylindric, 0.6–3.8 cm.

to 1.3 cm diam.;

sepals recurved to spreading, not enclosing flower;

filaments dilated, shorter than anthers, minutely tomentose;

pistillate pedicellate, without ring of sterile stamens.

to 3.3 cm diam.;

sepals recurved to spreading, not enclosing flower or fruiting head;

filaments cylindric, longer than anthers, pubescent;

pistillate pedicellate, without ring of sterile stamens.

heads 0.5–1 cm diam.;

achenes obovoid, abaxially keeled, 2.2–2.8 × 1.5–2 mm, beaked;

faces not tuberculate, wings 1–2, ± entire, glands 3–5;

beak lateral, incurved-erect, 0.2 mm.

heads 0.5–1.2 cm diam.;

achenes oblanceoloid, abaxially keeled, 1.6–2.5 × 0.8–1.1 mm, beaked;

faces not tuberculate, wings absent, glands 1;

beak lateral, erect, 0.3–0.7 mm.