Flora of North America species comparison

trigonous, 10–40 cm, scabrous proximal to inflorescence.

grooved, terete, 2–12 cm, smooth.

basal sheaths brown;

distal leaf sheaths concave at mouth;

blades 10–400 × 0.8–2 mm, equaling or exceeding culms at flowering and 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 3–8-flowered, 4.1–5.2 × 1.5–2.1 mm;

bracts equaling spikelets, 3.7–6 mm, apex awned, awn to 3 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 excurrent, apex mucronate.

scales brown, apex obtuse.

perianth bristles 3–6, brown, terete, nearly equaling achenes, scabrous;

anthers 1–1.5 mm.

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

anthers 0.9–1 mm.

compressed trigonous, 1.5–2 × 0.7–1.1 mm.

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