Flora of North America species comparison

erect to excurvedascending, narrowly linear to ± filiform, terete to obscurely trigonous, leafy, densely so toward base, stiff to rather lax.

erect or arching, leafy toward base, filiform, terete, wiry.

overtopped by culm;

blades linear, ascending, proximally flat, 1–4 mm wide, apex trigonous, subulate, tapering gradually.

overtopped by culm;

blades linear to filiform, channeled, 0.3–0.5 mm wide, margins deeply involute, apex setaceous.

spikelet clusters 1–3(–4), proximal mostly widely spaced, dense, broadly turbinate to hemispheric, to 2 cm broad; leafy bracts subulate, exceeding proximal spikelets, slightly or not exceeding most distal clusters.

spikelet clusters 1–2(–3), dense to open, narrowly to broadly turbinate;

branches capillary, variously elongate; leafy bracts setaceous, equaling or exceeding clusters.

redbrown, narrowly ovoid, (3–)3.5–5 mm, apex acute;

fertile scales ovate, 3–3.5(–4) mm, apex acute, mostly with cusp or mucro 0.5–1 mm.

variously brown, ellipsoid, 2–3 mm, apex sharply acute;

fertile scales ovate to nearly orbiculate, rounded, 1.2–1.8 mm, apiculate, convexcupulate, midrib slender, mostly included.

bristles 5–6, from rudimentary to reaching tubercle tip, or (rarely) beyond, antrorsely barbellate.

perianth absent.

1–3 per spikelet, (1.5–)2–2.2(–2.5) mm;

body dark brown with pale center, lenticular, broadly ellipsoid to ± orbicular, (1.3–)1.5–1.7(–1.9) × 1–1.5 mm, margins pale, narrow or narrowly rounded, flowing to tubercle;

surfaces dull, minutely longitudinally striate;

tubercle compressed, triangular to triangularsubulate, 0.5–0.7(–0.9) mm.

2–3 per spikelet, 0.7–0.9(–1) mm;

body pale, obovoid-lenticular, (0.5–)0.6–0.9 × 0.4–0.5 mm, margin wirelike;

surfaces transversely rugulose;

tubercle buttonlike, depressed triangular, 0.05–0.1 mm, base lunate atop rounded fruit body.