Flora of North America species comparison

erect, trigonous, multiribbed, rather stiff.

stiffly erect, leafy, triangular, multiribbed.

ascending, overtopped by inflorescence;

blades flat proximally, 3–10(–15) mm wide, apex attenuate, trigonous.

spikelet clusters 1–3, turbinate to hemispheric, 1.5–3 cm wide; subtending leafy bracts mostly exceeded by distal compound.

terminal and axillary, narrow, clusters of corymbs, clusters dense, mostly broadly turbinate, 13–15 mm;

bracteal leaves mostly exceeding subtended compounds.

pale brown to nearly white, fusiform, 4–5(–7) mm, apex narrowly acute;

fertile scales elliptic, 3.5–4 mm, apex narrowly acute, midrib excurrent as mucro.

brown, lanceoloid, 13–15 mm, apex acuminate;

fertile scales lanceolate, 10–13 mm, apex acuminate, midrib shortexcurrent.

perianth bristles (15–)18–20, reaching tubercle tip, retrorsely barbellate.

longer perianth bristles usually fully 2 times length of fruit body, antrorsely barbellate.

1 per spikelet, 2.5–3.2 mm;

body brown with pale center, obovoid distal to short stipe, lenticular, 1.7–2.2 × 0.8–1.5, margins narrow, wirelike, flowing into tubercle edges;

tubercle flat, narrowly triangular-subulate, 0.8–1 mm.

1–2 per spikelet, 20–25 mm;

body pyriformobovoid, compressed, 5–6 × 2.6–3.6 mm;

tubercle attenuate, 2-grooved, (15–)18–20(–21) mm.

leaves overtopped by culm;

blades narrowly linear, proximally flat, (1.5–)2–3.5 mm wide, apex tapering, trigonous.

= 18.