Flora of North America species comparison

emersed;

petiole 5-ridged, ascending to erect, 24.5–60 cm;

blade sagittate, 11.5–26.5 × 0.8–15 cm, basal lobes longer than remainder of blade.

emersed;

petiole triangular, 15–54 cm;

blade lanceolate to ovate, 5–20 × 1–10.5 cm.

racemes, rarely panicles, of 5–17 whorls, emersed, 20–37 × 5–27 cm;

peduncles 25–96 cm;

bracts connate more than or equal to ¼ total length, lanceolate, 6.5–15 mm, delicate, not papillose; fruiting pedicels spreading, cylindric, 1.5–4.4 cm.

racemes, rarely panicles, of 2–11 whorls, emersed;

bracts scarcely connate proximally, linear to lanceolate, 10–30 mm, delicate, not papillose; fruiting pedicels spreading to ascending, cylindric, 1.5–3.5 cm.

to 3 cm diam.;

sepals recurved to spreading, not enclosing flower;

filaments cylindric, shorter than anthers, glabrous; pistillate flowers pedicellate, without ring of sterile stamens.

to 23 mm diam.;

sepals recurved, not enclosing flower or fruiting head;

filaments linear, shorter than anthers, glabrous; pistillate pedicellate, without ring of stamens.

heads 0.9–1.5 cm diam;

achenes oblanceoloid, abaxially keeled, 1.2–2.5 × 0.8–1.6 mm, beaked;

faces tuberculate, wings absent, glands 0–1;

beak lateral, erect, 0.1–0.6 mm.

heads 0.8–1.2 cm diam;

achenes cuneate-obovoid, abaxially keeled, 1.5–2.1 × 0.8–1.5 mm, beaked;

faces not tuberculate, wings 0–1, ± entire, glands absent;

beak lateral, horizontal or incurved, 0.1–0.2 mm.