Flora of North America species comparison

present.

absent.

terete, without spots, to 250 cm;

nodal glands absent.

conspicuously flattened ("wing-flattened"), without spots, 60–120 cm;

glands absent or rarely present, when present, gold, 0.3 mm diam.

absent.

common, terminal or lateral, 4–7.5 × 2–4.5 cm, firm;

leaves ± 2-ranked;

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

inner leaves undifferentiated.

submersed, ± spirally arranged, sessile, lax;

stipules deteriorating into fibers and deciduous, inconspicuous (absent on proximal portion of stem), convolute, free from blade, light brown to green, not ligulate, 3.5–6.5 cm, not fibrous, not shredding at apex;

blade olive-green, broadly lanceolate, orbiculate, or ovate, not arcuate, 0.9–7.6(–9.7) cm × 7–40 mm, base rounded, without basal lobes, clasping, margins entire, often crispate, apex not hoodlike, not splitting when pressed, round, rarely acute;

veins 3–25.

submersed, ± spirally arranged, sessile, rigid;

stipules persistent, conspicuous, convolute, free from blade, white, not ligulate, 1.5–3.5 cm, fibrous, shredding at tip, apex obtuse to acuminate;

blade light green, linear, not arcuate, 10–20 cm × 2–5 mm, base rounded, without basal lobes, not clasping, margins entire, not crispate, apex not hoodlike, blunt, acuminate, or bristle-tipped, lacunae absent;

veins 15–35.

unbranched, emersed;

peduncles not dimorphic, terminal or axillary, erect to rarely recurved, cylindric, 1–7.3 cm;

spike not dimorphic, cylindric, 0.4–4.8 cm.

unbranched, emersed;

peduncles not dimorphic, terminal, erect to ascending, occasionally recurved, cylindric, 2–5 cm;

spikes not dimorphic, cylindric, 15–30 mm.

sessile, greenish brown to olive-green, obovoid, turgid or rarely concave, not abaxially or laterally keeled, 1.6–3 × 1.3–2.2 mm;

beak erect, 0.4–0.6 mm;

sides without basal tubercles;

embryo with 1 full spiral.

light green to olive-green, quadrate-oblong or nearly orbicular, turgid, sessile, with abaxially keeled, not laterally keeled, 4–5 × 3–3.5 mm, keel winglike;

beak erect, 0.6–1 mm;

sides without basal tubercles;

embryo with 1 full spiral.

= 52.

= 52.