Flora of North America species comparison

terete, without spots, to 200 cm;

nodal glands absent.

terete, with red spots, 7–75 cm;

nodal glands absent.

absent.

absent.

submersed and floating or floating absent, ± spirally arranged.

both submersed and floating, ± spirally arranged.

petioles continuous in color to apex, 0.1–1.2 cm;

blade reddish green, elliptic or oblanceolate to obovate or oblong-linear, 4–7(–10) cm × 10–25(–40) mm, base gradually tapering into petiole, apex obtuse or acute;

veins (7–)9–13(–15).

petioles continuous in color to apex, 3.2–7.5 cm;

blade adaxially light to dark green, lanceolate to elliptic or ovate, (1.5–)2–4(–5.5) cm × 10–20(–30) mm, base rounded or tapering, apex acute;

veins (7–)9–19(–23).

sessile, lax;

stipules persistent, inconspicuous, convolute, free from blade, light brown to reddish, not ligulate, (1.2–)1.5–2.5(–4) cm, not fibrous, not shredding at tip, apex blunt;

blade reddish green, oblong-linear to linear-lanceolate, not arcuate, 4.5–18(–25) cm × 5–20 mm, base rounded, without basal lobes, slightly clasping, margins entire, not crispate, apex not hoodlike, obtuse or acute, lacunae in 0–6 rows each side of midvein;

veins 7–9.

sessile, lax;

stipules persistent, conspicuous, convolute, free from blade, whitish, not ligulate, 1–3 cm, delicately fibrous, not shredding at tip, apex obtuse;

blade pale green, linear to phyllodial, not arcuate, 5–16 cm × (0.25–)0.3–1 mm, base slightly tapering, without basal lobes, not clasping, margins entire, not crispate, apex acute, not hoodlike, lacunae absent, setaceous;

veins 3.

unbranched, emersed;

peduncles not dimorphic, terminal or axillary, erect, cylindric, 3–10(–16) cm;

spikes not dimorphic, cylindric, 10–35 mm.

unbranched, emersed;

peduncles not dimorphic, terminal, ascending to spreading, cylindric, 2.5–8 cm;

spikes not dimorphic, cylindric, 10–35 mm.

pedicellate, tawny olive-green, obovoid, plump, turgid, abaxially keeled, laterally keeled or not, (2.5–)3–3.5 × (1.7–)2–2.4 mm, lateral keels when present without points;

beak abaxially curved, 0.5–0.9 mm;

sides without basal tubercles;

embryo with 1 full spiral.

sessile, greenish brown, obovoid, turgid, abaxially keeled, laterally keeled, 2.5–3.5(–3.7) × (1.6–)2–2.4 mm, lateral keels without points;

beak erect, 0.4–0.8 mm;

sides without basal tubercles;

embryo with 1 full spiral.

apparently unknown.

present.

present.

= 52.