Flora of North America species comparison

trigonous, 7.5–36 cm, scabrous proximal to inflorescence.

grooved, terete, 5–14 cm, smooth.

basal sheaths orange to dark brown;

distal leaf sheaths truncate to concave at mouth;

blades (6–)15–250 × 0.5–0.8(–1) mm, equaling or shorter than culms at flowering, much shorter than culms at fruiting.

basal sheaths brown;

distal leaf sheaths truncate to concave at mouth;

blades 2–8.4 × 0.4–0.5 mm, much shorter than culms at flowering and fruiting.

spikelets 3–6-flowered, 3.4–5.3 × 1.3–2.5 mm;

bracts shorter than to slightly exceeding spikelets, 3–6 mm, apex mucronate or awned, awn to 1.4 mm.

spikelets 3–6-flowered, 3–4.6 × 1.7–2.8 mm;

bracts shorter than spikelets, 1.6–2.5 mm, apex mucronate.

scales orange-brown to dark brown, midribs not reaching apices in distal scales, apex obtuse.

scales brown, apex obtuse.

perianth bristles 3–6, pale brown, terete, equaling or shorter than achenes, scabrous;

anthers 0.7–1.5 mm.

perianth bristles absent;

anthers 0.8–1.5 mm.

compressed trigonous, 1.5–2 × 1–1.2 mm.

compressed trigonous to plano-convex, (1.2–)1.4–1.9 × 0.8–1.2 mm.