Flora of North America species comparison

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

erect to excurved, filiform, leafy, ± terete.

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.

shorter than culm;

blades ascending, filiform, proximally to 1.5(–2)mm wide, apex trigonous, tapering, setaceous.

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

lateral spikelet clusters (0–)1–2, distant, terminal cluster ellipsoid to broadly turbinate or hemispheric, branches ascending; leafy bracts setaceous, overtopping clusters.

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.

red-brown to deep brown, lanceoloid, (4–)5–6(–7) mm, apex acute;

fertile scales lanceolate, 4–5(–6) mm, apex acuminate, midrib often excurrent as awn.

bristles 6, reaching from mid tubercle to beyond tip.

bristles 5–6, longest reaching at least past tubercle base, mostly to tip or beyond, 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.

2(–3) per spikelet, (2.3–)2.5–2.6(–3) mm with pedicellar joint, receptacle, and tubercle;

body lustrous, pale brown to deep brown, obovoid to ellipsoid, lenticular, 1–1.5 × 1 mm, margins narrow, flowing to tubercle;

surfaces longitudinally finely lined, transversely very finely ridged with wavy rows of very narrow, vertical lattices, sometimes also with lines of shallow pits;

tubercle triangularsubulate, (0.7–)1–1.3(–1.5) mm, base lunate, margins setulose proximally.