Flora of North America species comparison

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

arching, leafy, droopingtipped, ± terete, ribbed, slender.

slightly to much exceeded by culm;

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

terminal;

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

clusters of spikelets 3–6, progressively wider-spaced proximally, narrow, elongate; leafy bracts slender, mostly exceeding clusters.

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.

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

fertile scales narrowly ovate, 4–5 mm, apex acuminate, midrib included or shortexcurrent.

bristles vestigial or obsolete.

perianth bristles 6, exceeding tubercle, antrorsely barbellate.

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.

(1–)2–3(–4) per spikelet, 3–3.2 mm;

body brown, narrowly oblong-ellipsoid, flattened, 2 × 0.8–1 mm;

surface strongly transversely wavyrugose, vertically finely striate between ridges;

tubercle compressed, narrowly triangular-subulate, 1 mm.

leaves exceeded by culm;

blades spreading to ascending, narrowly linear, proximally flat, 2–3.5 mm wide, apex trigonous, tapering.