Flora of North America species comparison

erect to excurved, lax, filiform, leafy, ± terete.

arching, leafy, droopingtipped, ± terete, ribbed, slender.

exceeded by culm, ascending;

blades filiform, ± terete, margins strongly involute, apex trigonous, sulcate, tapering.

spikelet clusters mostly 2–3, sparse to dense, oblong to broadly or narrowly turbinate; leafy bracts setaceous, exceeding clusters.

clusters of spikelets 3–6, progressively wider-spaced proximally, narrow, elongate; leafy bracts slender, mostly exceeding clusters.

pale redbrown, lanceoloid, 3–3.5 mm, apex acute;

fertile scales mostly elliptic, 2–2.5 mm, apex acute, sometimes apiculate.

redbrown, lanceoloid, 5–7 mm, apex acuminate;

fertile scales narrowly ovate, 4–5 mm, apex acuminate, midrib included or shortexcurrent.

bristles mere nubs or 1–2, to 0.3 mm.

perianth bristles 6, exceeding tubercle, antrorsely barbellate.

mostly 2 per spikelet, 1.5–1.6 mm;

body redbrown with pale center, lenticular, broadly obovoid to orbicular, margins pale, narrow, flowing to tubercle;

surfaces smoothish, or faintly cancellate;

tubercle flattened, triangularsubulate, 0.3–0.5 mm.

(1–)2–3(–4) per spikelet, 3–3.2 mm;

body brown, narrowly oblong-ellipsoid, flattened, 2 × 0.8–1 mm;

surface strongly transversely wavyrugose, vertically finely striate between ridges;

tubercle compressed, narrowly triangular-subulate, 1 mm.

leaves exceeded by culm;

blades spreading to ascending, narrowly linear, proximally flat, 2–3.5 mm wide, apex trigonous, tapering.