Flora of North America species comparison

erect or excurved, linear, leafy, trigonous, slender.

erect, leafy, nearly terete or angled, manyribbed.

slightly to much exceeded by culm;

blades ascending, narrowly linear, proximally flat, 1–3 mm wide, apex trigonous, tapering gradually, setaceous.

terminal;

spikelet single, terminal cluster of spikelets crowded, hemispheric, 2.5 cm wide; leafy bracts linearsetaceous, much exceeding cluster.

terminal and axillary, clusters of corymbs 1–5, usually diffuse; leafy bracts exceeding proximal corymbs.

whitish to tan, narrowly lanceoloid, (3.5–)4–5.5 mm, apex acuminate;

fertile scales lanceolate, 3.5–4(–4.5) mm, apex narrowly acute, minutely awned or apiculate.

dark brown, lanceoloid to ovoid, mostly 4–6(–8) mm, apex acute;

fertile scales many, ovate, rounded-convex, 2–3.5 mm, apex acute, midrib mostly included, rarely forming apiculus.

bristles vestigial or obsolete.

perianth absent.

1 per spikelet, (1.9–)2–2.3 mm;

body brown with pale center, lenticular, broadly ellipsoid, 1.5–2 × 1.5 mm, margins flowing to tubercle;

surfaces longitudinally finely striate;

tubercle depressedtriangular, 0.2–0.3(–0.4) mm.

1–1.3(–1.5) mm, body dark brown, tumidly lenticular, nearly orbicular, 0.7–1 × 0.7–1 mm, margins strong, interrupted at tubercle base;

surfaces irregularly transversely rugulose with wavy rows of vertical, linear, raised cells;

tubercle depressed-triangular, 0.1–0.3 mm, capping fruit summit, base broadly 2lobed.

midculm leaves often exceeding inflorescences;

blades linear, proximally flattened, 1–5 mm wide, apex trigonous, tapering.