Flora of North America species comparison

lax, leafy, wandlike, ± terete to obscurely angled, slender.

erect to ascending, narrowly linear, wandlike, terete, leafy proximal to middle.

ascending, exceeded by culms;

blades flat, 4–7(–10) mm wide, apex trigonous, shortacuminate, tapering.

erect to ascending;

blades proximally flat, 2.5–3.5 mm wide, apex tapering, tip abruptly blunt.

spikelet clusters 4–6 or more, equidistant along culm on ascending peduncles, branches capillary, divaricate, clusters loose, diffuse, rounded.

terminal, cluster of spikelets crowded, broadly turbinate to hemispheric, to 1.5 cm wide; leafy bracts linearsetaceous, slightly exceeding cluster.

light brown, ellipsoid to lanceoloid or ovoid, 2.5–3.5 mm, apex acute;

fertile scales ovate, (1.5–)2–3 mm, apex rounded or acute, midrib forming apiculus.

orangebrown, lancefusiform, 6–7 mm, apex acuminate;

fertile scales lanceovate, 4–5 mm, apex acuminate with excurved awn to 1 mm.

perianth bristles 6, longest exceeding tubercle, antrorsely barbellate.

bristles 3–4, some reaching tubercle tip, antrorsely barbellate.

2–several per spikelet, 1.3–1.5 mm;

body pale brown, broadly obovoid, tumidly biconvex, 1.1–1.2 × 1–1.1 mm;

surfaces transversely sharply wavyrugulose, intervals with vertical, rectangular, shallow alveolae;

tubercle depressedconic, slightly compressed, 0.2–0.3(–0.4) mm, edges setulose.

1–2 per spikelet, 2–2.1 mm;

body brown with paler center, obovoidlenticular, 1.5–1.7 × 1.2–1.3 mm, margins flowing to tubercle;

surfaces finely transversely striate with minute pits;

tubercle lowtriangular, 0.3–0.5 mm.