Flora of North America species comparison

erect, leafy, nearly terete or angled, manyribbed.

erect to curved, leafy, obscurely trigonous to nearly terete, few ribbed, slender.

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

clusters 1 or 2–3, then widely spaced, narrowly turbinate to hemispheric, 1.5–2.5 cm wide; subtending leafy bracts often exceeded by distal cluster.

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.

pale brown to nearly white, ellipsoid, 3.5–5.5 mm, apex acute;

fertile scales elliptic, 3–3.5(–4) mm, apex acute or acuminate, midrib excurrent as mucro.

perianth absent.

perianth bristles 10–12, slightly overtopping tubercle, retrorsely barbellate or rarely smooth, base often setose.

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.

1(–2) per spikelet, (2.3–)2.5–3 mm;

body pale brown with paler center, stipitateobovoid, lenticular, 1.5–1.8(–2) × 0.9–1.2 mm;

surfaces transversely striate, relatively smooth, rim narrow, flowing to tubercle base;

tubercle narrowly triangularsubulate, 0.5–1.2 mm.

midculm leaves often exceeding inflorescences;

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

leaves mostly overtopped by culm;

blades narrowly linear to filiform, proximally flat, 0.5–1.5 mm, apex tapering, trigonous.