Flora of North America species comparison

absent.

present.

terete, without spots, 20–50 cm;

glands white, 0.1–0.7 mm diam.

terete, often rusty spotted, 6–110 cm;

nodal glands absent.

terminal or axillary, common, 4.2–8.4 cm × 1.4–2.5 mm, soft;

leaves ± 4-ranked;

outer leaves 2 per side, base without corrugations, apex acute to apiculate;

inner leaves unmodified.

absent.

submersed, ± spirally arranged, sessile, delicate;

stipules deliquescent to persistent, inconspicuous, convolute, free from blade, brown, not ligulate, 0.45–1.91 cm, not fibrous, not shredding at tip, apex obtuse;

blade pale to deep green, linear, not arcuate, 2.6–8.8 cm × 0.7–1.7 mm, base slightly tapering, without basal lobes, not clasping, margins entire, not crispate, apex not hoodlike, acute to apiculate, lacunae absent or present, 0–3 rows each side of midrib;

veins 7–11.

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

petioles continuous in color to apex, 2.3–22.6 cm;

blade adaxially light green, lanceolate to round elliptic, 4.3–9.2 cm × 25–38 mcm, base rounded to cordate, apex acute to rounded;

veins 27–49.

petiolate, lax;

stipules persistent, conspicuous, convolute, free from blade, light brown, not ligulate, 1.5–11.7 cm, not fibrous, not shredding at tip, apex acute;

petioles terete, 0.9–11.5 cm;

blade light to dark green, ovate to oblanceolate, distinctly arcuate, 5–12.5 cm × 15–58 mm, base rounded to acute, without basal lobes, not clasping, margins entire, crispate, apex not hoodlike, acute to round-apiculate, lacunae absent;

veins 19–49.

unbranched, emersed;

peduncles not dimorphic, terminal, erect, cylindric, 20 mm;

spikes not dimorphic, cylindric, 5 mm.

unbranched, emersed;

peduncles not dimorphic, terminal or axillary, erect, cylindric, 4.5–22.3 cm;

spikes not dimorphic, cylindric, 34–65 mm.

not laterally keeled, 2.6–2.7 × 2 mm;

beak erect, 0.3 mm;

sides without basal tubercles;

embryo with 1 full coil.

sessile, reddish brown, obovoid, turgid, abaxially keeled, laterally ridged, 5–6.7 × 4.5–5.2 mm, lateral ridges without points;

beak erect, 0.5–0.8 mm;

sides without basal tubercles;

embryo with full spiral.

= 26.

= 52.