Flora of North America species comparison

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

ascending-excurved, leafy, ± terete, slender.

ascending, overtopped by culm;

blades narrowly linear, proximally flat, 2–3 mm wide, apex trigonous, tapering.

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

spikelet clusters (1–)2–3, widely spaced, open to dense, broadly to narrowly turbinate, branches ascending to slightly spreading, capillary; leafy bracts setaceous-tipped, overtopping all but distal clusters.

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

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

light red-brown, ovoid, 3.5–5 mm, apex acuminate;

fertile scales ovate, 2.5–3.5 mm, apex acute, midrib excurrent as cusp or mucro.

perianth bristles 6, exceeding tubercle, antrorsely barbellate.

perianth bristles 6, reaching at most 2/3 length of fruit body, antrorsely barbellate.

(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.

1–4(–5) per spikelet, 2 mm;

body brown, strongly compressed, obovoid-ellipsoid, 1.4–1.6 × 1–1.2 mm, margins flowing to tubercle;

surfaces finely transversely rugose, intervals with narrow vertical alveolae;

tubercle flat, low-triangular, 0.2–0.3(–0.5) mm.

leaves exceeded by culm;

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