Flora of North America species comparison

flattened, without spots, 10–90 cm;

glands absent.

terete, without spots, 5–30 cm;

nodal glands absent.

absent.

absent.

both submersed and floating or floating absent, ± spirally arranged.

both submersed and floating or only submersed, ± spirally arranged.

petiolate;

petioles continuous in color to apex, 2–12.5 cm;

blade adaxially light green, narrowly oblong-oblanceolate to elliptic, 2–8 cm × 4–20 mm, base acute, apex rounded or bluntly cuspidate;

veins 11–41.

petioles continuous in color to apex, 1–17 cm;

blade adaxially reddish brown, ovate, 3–8(–10) cm × 10–46 mm, base rounded or slightly cordate, apex obtuse, acute, or somewhat apiculate;

veins (11–)15–19(–21).

sessile, lax;

stipules persistent, inconspicuous, convolute, free from blade, red-brown, not ligulate, 1–3 cm, not fibrous, not shredding at tip, apex obtuse;

blade red-brown to light green, linear, not arcuate, 5–22 cm × 1–10 mm, base not clasping, without basal lobes, margins entire, not crispate, apex not hoodlike, blunt to acute, lacunae present, broad band each side of midvein;

veins 3–13.

petiolate, lax;

stipules persistent, conspicuous, convolute, free from blade, greenish, not ligulate, to 3 cm, not fibrous, not shredding at tip, apex acute;

petioles 1–3(–8) cm;

blade dark green, lanceolate to occasionally ovate, occasionally arcuate, 3–13 cm × 4–15(–44) mm, base acute, without basal lobes, not clasping, margins entire, not crispate, apex not hoodlike, acute, lacunae in 2–4 rows each side of midvein;

veins 7–11.

unbranched, emersed;

peduncles not dimorphic, axillary, erect, cylindric, 1.5–5(–16) cm;

spikes not dimorphic, cylindric, 0.8–4 cm.

unbranched, emersed;

peduncles not dimorphic, erect to slightly recurved, cylindric, 4–12 cm;

spikes not dimorphic, cylindric, 20–40 mm.

sessile, greenish brown, round-obovoid, flattened, abaxially and laterally keeled, 2.5–4.5 × 2–3.6 mm, lateral keels without sharp points;

beak erect, 0.5 mm;

sides without basal tubercles;

embryo with less than 1 full spiral.

sessile, dark reddish brown, obovoid to orbicularoid, compressed, not abaxially or laterally keeled, (1.6–)2–2.5 × (1.2–)1.5–2.1 mm;

beak minute or obsolete, recurved;

sides without basal tubercles;

embryo with 1 full spiral.

present.

present.

= 26.

= 26.