Flora of North America species comparison

1–2 mm diam.

erect, 2–4 mm diam.

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.

0–1, straw-colored, apex narrowly acute.

basal 1–3, cauline 3–4, straw-colored;

auricles absent;

blade 3–20 cm × 3–7 mm.

basal;

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

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

panicles of 10–50 heads, 6–20 cm, erect to ascending branches;

primary bract erect;

heads 3–11-flowered, turbinate to hemispheric, 4–8 mm diam.

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

primary bract usually shorter than inflorescence.

tepals straw-colored, lanceolate, 2.5–3.2 mm, nearly equal, apex acute to narrowly acuminate, mucronate;

stamens 6, anthers 0.5–1.5 times length of filaments.

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.

exserted, chestnut brown, 1-locular, broadly lanceoloid to narrowly oblong, 3.3–4.7 mm, apex tapering to beak, separating at dehiscence.

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

obovoid, 0.5 mm, not tailed.

brown, ovoid, 0.3–0.4 mm, not tailed.