Flora of North America species comparison

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

erect or excurved, linear, leafy, trigonous, slender.

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.

slightly to much exceeded by culm;

blades ascending, narrowly linear, proximally flat, 1–3 mm wide, apex trigonous, tapering gradually, setaceous.

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

terminal;

spikelet single, terminal cluster of spikelets crowded, hemispheric, 2.5 cm wide; leafy bracts linearsetaceous, much exceeding cluster.

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.

whitish to tan, narrowly lanceoloid, (3.5–)4–5.5 mm, apex acuminate;

fertile scales lanceolate, 3.5–4(–4.5) mm, apex narrowly acute, minutely awned or apiculate.

bristles 6, reaching from mid tubercle to beyond tip.

bristles vestigial or obsolete.

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 per spikelet, (1.9–)2–2.3 mm;

body brown with pale center, lenticular, broadly ellipsoid, 1.5–2 × 1.5 mm, margins flowing to tubercle;

surfaces longitudinally finely striate;

tubercle depressedtriangular, 0.2–0.3(–0.4) mm.