Flora of North America species comparison

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

erect to ascending, leafy, slender, angular.

shorter than culm;

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

exceeded by culm;

blades linear, proximally flat, 3–6 mm wide, apex tapering, trigonous, subulate.

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

terminal cluster mostly dense, hemispheric;

proximalmost leafy bract subulate, much exceeding clusters.

of terminal and axillary clusters, 3–5, proximalmost widely spaced, turbinate or lobed, fascicles dense, branches ascending; leafy bracts exceeding all but proximalmost clusters.

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

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

rich redbrown, ovoid, (4–)5–6(–7) mm, apex acuminate;

fertile scales ovate, (3.5–)4–5 mm, apex acuminate, midrib short or longexcurrent.

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

perianth bristles 6, reaching past tubercle, 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.

mostly 3–4(–7) per spikelet, 3 mm with pedicellar joint and tubercle;

body pale yellowbrown, obovoidlenticular, 1.4–1.7 × 1.4 × 1.5;

surfaces transversely finely wavyrugulose, intervals vertically rectangularalveolate;

pedicellar joint 0.3–0.6 mm;

tubercle compressed, triangularacuminate, 0.5–0.6 (–1) mm, margin setulose.