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, sessile, phyllodial, linear to lanceolate, flattened, 15–25(–40) × 1.5–4 cm, or petiole triangular, 15–50 cm, blade linear to elliptic-lanceolate, 4–10 × 0.3–2 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 3–6 whorls, 1.5 × 4 cm;

peduncle 20–60 cm;

bracts connate greater than or equal to ¼ total length, ovate, 4–10 mm, nearly scarious, not papillose; fruiting pedicels spreading, cylindric, 0.8–3 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 0.8 cm diam.;

sepals recurved to spreading, not enclosing flower;

filaments dilated, exceeding anthers in length, 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 1.2–2 cm diam.;

achenes cuneate-obovoid, abaxially keeled, 2.5–3 × 1.4–1.8 mm, beaked;

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

beak ascending to horizontal, 0.4–0.7 mm.

= 22.