Flora of North America species comparison

densely branching.

few–20.

first ascending, soon arcuate-stoloniferous and creeping or floating, or growing submersed along bottom, each node with cluster of basal leaves and fibrous roots, eventually each emergent terrestrial node with floriferous culm.

basal, (1–)2–3;

auricles 2–5 mm, apex acute, membranous;

blade flat, 3–12 cm × 0.5–1 mm, margins entire.

basal;

auricles 0.5–1 mm, apex acutish, membranous or thicker;

blade spreading, flat, 2–10(–15) cm × 1–3 mm.

5–40-flowered, borne congested or branch internodes ca. as long as tepals, ssomewhat loose, 1–5 cm;

primary bract usually longer than inflorescence.

glomerules, (1–)2–10, each with 3–12 flowers, open;

primary bract usually shorter than inflorescence.

bracteoles 2;

tepals greenish, lanceolate, 3.3–4.4 mm;

outer and inner series nearly equal;

stamens 6, filaments 0.5–0.9 mm, anthers 0.1–0.2 mm;

style 0.1–0.2 mm.

tepals green, margins scarious;

inner series narrowly lanceolate, 5–9 mm, apex usually recurved;

outer series obviously shorter, apex usually erect;

stamens 3, filaments 1.5–3 mm, anthers 0.5–0.8 mm;

style 0.5 mm.

tan or light brown, 1-locular to pseudo-3-locular, ellipsoid, (3.3–)3.8–4.7 × (1.1–)1.3–1.7 mm, nearly equal to tepals.

tan, 3-locular, narrowly ellipsoid, 3.5–5.5 × 0.8–1.2 mm.

tan, ellipsoid to lunate, (0.52–)5.5–0.65(–0.7) mm, not tailed.

brown, ovoid, 0.3–0.4 mm, not tailed.

= 80.