Flora of North America species comparison

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

grooved, terete, 2–12 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 concave at mouth;

blades 3.7–13 × 0.4–0.7 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 2–5-flowered, 3–4 × 1.5–2.5 mm;

bracts 3.5–6.7 mm, 3.5–7.7, exceeding spikelets, apex with awn, awn (0.9)1–5.3 mm.

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 0–6, brown, flattened, shorter than achenes, smooth or scabrous;

anthers 0.9–1 mm.

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

sharply trigonous, 1.2–1.6 × 0.7–0.8 mm.