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;

petiole terete, 44–58 cm;

blade linear to ovate or elliptic, 20.3–35 × 0.7–16 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 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 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 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 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 0.5–1.2 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.

= 22.