Flora of North America species comparison

erect to excurved, leafybased, narrowly linear, ± terete.

stiffly erect, leafy, triangular, multiribbed.

shorter than culm;

blades ascending, narrowly linear, proximally flat or margins slightly involute, 0.5–1(–2) mm wide, distally canaliculate, apex trigonous, tapering, subulate.

ascending, overtopped by inflorescence;

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

spikelet clusters 1–3, laterals 0–2, all turbinate to hemispheric, terminal internode usually excurved; leafy bracts setaceous, overtopping inflorescence.

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

bracteal leaves mostly exceeding subtended compounds.

redbrown, lanceoloid, 5–7 mm, apex acute;

fertile scales lanceolate, (2.5–)4–5 mm, apex acute to acuminate;

midrib paralleled by several indistinct ribs, excurrent as short awns.

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

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

bristles 6, reaching from mid tubercle to beyond tip.

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

3(–4) per spikelet, 2.1–2.5 mm;

stipe and receptacle 0.2–0.3 mm, sparsely setose and setulose;

body glossy, brown with pale center, obovoid-lenticular, 1.1–1.5 × 1–1.1 mm, surfaces finely longitudinally lined, variably low papillatecancellate, also often transversely with wavy lines of dark dots;

tubercle flattened, triangular-subulate, (0.8–)0.9–1(–1.1) mm, setulose-ciliate.

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.

= 18.