Flora of North America species comparison

grooved, terete, 5–45 cm, smooth.

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

basal sheaths brown;

distal leaf sheaths concave at mouth;

blades 1.5–8 × 0.3–0.4 mm, much shorter than culms at flowering and fruiting.

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.

spikelets 3–9-flowered, 3.3–7 × 1.2–3 mm;

bracts equaling spikelets, 3.3–4.5 mm, apex with awn less than 1 mm.

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.

scales reddish brown to dark brown, apex mucronate to acute.

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

perianth bristles 6, brown, terete, equaling or exceeding achenes, smooth to scabrous;

anthers 1.5–2.6 mm.

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

anthers 0.7–1.5 mm.

compressed trigonous, 1.4–1.7 × 0.6–0.9 mm.

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

= 104.