Flora of North America species comparison

present.

present.

terete, conspicuously spotted, 8–95 cm;

nodal glands absent.

flattened, without spots, 10–90 cm;

glands absent.

absent.

absent.

both submersed and floating, ± spirally arranged.

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

petioles continuous in color to apex, 1–16.5 cm;

blade adaxially light to dark green, lanceolate to round-ovate, 2.5–8.5 cm × 11–44 mm, base rounded to cordate, apex acute to rounded;

veins 15–21.

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.

petiolate, lax;

stipules deliquescent, inconspicuous, convolute, free from blade, light to dark brown, not ligulate, 0.7–1.2 cm, not fibrous, not shredding at tip, apex obtuse;

petioles 0.5–4.5 cm;

blade dark green, linear-lanceolate to lanceolate, often arcuate, 3.5–13.8 cm × 60–165 mm acute, base acute to rounded, without basal lobes, margins entire, crispate, apex not hoodlike, acute to obtuse, lacunae in 2–5 rows each side of midrib;

veins 7–19.

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.

unbranched, emersed;

peduncles not dimorphic, terminal or axillary, erect to ascending, cylindric, 3.3–9.4 cm;

spikes not dimorphic, cylindric, 17–36 mm.

unbranched, emersed;

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

spikes not dimorphic, cylindric, 0.8–4 cm.

sessile, dark green to dark brown, ovoid to obovoid, turgid, abaxially keeled, laterally ridged, 5–6.5 × 4.1–5 mm, lateral ridges without points;

beak erect, 0.5 mm;

embryo with 1 full spiral.

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.

apparently unknown not available.

= 26.