Flora of North America species comparison

stiffly erect to ascending, linear, leafy toward base, sharply trigonous, angles scabrid.

erect or ascending, terete to obscurely trigonous, multiribbed, densely leafybased, slender, stiff, papillose to scabridpuberulent.

shorter than culm;

basal leaves forming strong rosette, shortlinear, flat, 3–5 mm wide, distal more widely spaced, narrower, apex shortacuminate, trigonous.

forming strong rosette, distal widely spaced, much exceeded by scape;

basal leaf blades shortlinear, flat, 4–6 mm wide, culm leaf blades narrower, longer, all ciliate, apex bluntly acute.

spikelet clusters 1(–2), if 2 then closely set;

terminal cluster mostly dense, hemispheric;

proximalmost leafy bract subulate, much exceeding clusters.

terminal;

spikelet cluster 1, crowded, hemispheric, often lobed, to 2 cm wide;

bracts strongly ciliate distally;

longer leafy bracts exceeding cluster.

dark redbrown, ovoid, (4–)5–6 mm, apex acute;

fertile scales ovate, mostly 4–4.5 mm, apex excurvedcuspidate.

dark redbrown, ovoid, 4–5(–6) mm, apex acute;

fertile scales broadly ovate, 4–4.5 mm, apex blunt, sometimes apiculate or with mucro to 1 mm, midrib scabrid.

bristles 12, reaching to or slightly beyond tubercle tip, antrorsely barbellate.

bristles 6, some vestigial, none reaching past fruit midbody, antrorsely barbellate.

1–2 per spikelet, 3–3.5(–3.7) mm;

body dark brown with paler center, dull, broadly ellipsoid-lenticular, 2–2.5 × 1.8–2 mm, smooth, margins flowing to tubercle;

tubercle flat, concavely triangular, 0.7–1(–1.2) mm.

1–2 per spikelet, (1.9–)2–2.5 mm;

body dark brown with paler center, lenticular, broadly ellipsoid to orbicular, 1.6–2 × 1.5–1.6 mm, margins flowing to tubercle;

tubercle lowtriangular, 0.5 mm, often apiculate.