Flora of North America species comparison

emersed;

petiole triangular, erect to ascending, 6.5–51 cm;

blade sagittate, rarely hastate, 1.5–30.5 × 2–17 cm, basal lobes equal to or less than remainder of blade.

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

racemes, rarely panicles, of 3–9 whorls, emersed, 4.5–28.5 × 4–23 cm;

peduncles 10–59 cm;

bracts connate more than or equal to ¼ total length, elliptic to lanceolate, 3–8 mm, delicate, not papillose; fruiting pedicels spreading, cylindric, 0.5–3.5 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.

to 4 cm diam.;

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

filaments cylindric, longer than anthers, glabrous;

pistillate pedicellate, without ring of sterile stamens.

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.

heads 1–1.7 cm diam;

achenes oblanceoloid, without abaxial keel, 2.5–3.5 × to 2 mm, beaked;

faces not tuberculate, wings absent, glands (0–)1(–2);

beak lateral, horizontal, 1–2 mm.

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.

= 22.