Flora of North America species comparison

present.

absent.

flattened, without spots, 10–90 cm;

glands absent.

slightly compressed, without spots, 30–60 cm;

glands rare, when present, brown to green, 0.1–0.3 mm diam.

absent.

terminal, rare, 2.8–3 cm × 1.5–3 mm, soft;

leaves ± 2-ranked;

outer leaves 3–4 per side, base not corrugate, apex acute to apiculate;

inner leaves undifferentiated.

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

submersed, ± spirally arranged, sessile, delicate;

stipules persistent, inconspicuous, convolute, free from blade, white to light brown, not ligulate, 0.7–1.6 cm, slightly fibrous, rarely shredding at tip, apex obtuse;

blade pale green to olive-green, linear, not arcuate, 2–6 cm × 0.6–2.5(–4) mm, base slightly tapering, without basal lobes, not clasping, margins entire, not crispate, apex not hoodlike, apiculate to bristle-tipped or rarely blunt, lacunae in 1–2 rows each side of midrib;

veins 3.

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.

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, axillary, erect, cylindric, 1.5–5(–16) cm;

spikes not dimorphic, cylindric, 0.8–4 cm.

unbranched, emersed;

peduncles not dimorphic, axillary and/or terminal, erect to ascending, rarely recurved, slightly clavate, 6–13.5 mm;

spikes not dimorphic, globose, (2–) 4–7 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.

brown to light greenish brown, ovoid to orbicular, turgid, sessile, abaxially and laterally keeled (3-keeled), 2.3–4 × 2–3.2 mm, lateral keels without points;

beak erect, 0.3–0.7 mm;

sides without basal tubercles;

embryo with 1 full spiral.

unknownnot available.

= 26.