Flora of North America species comparison

nearly distichous, spreading to ascending, 1/2 length of culms;

sheath margins entire, backs smooth to pubescent;

ligule present, complete;

blades narrowly linear, proximally flat, 2–3.5(–4) mm wide, margins scabrid-ciliate, abaxial surface sometimes pubescent.

distichous, shorter or longer than culms;

sheaths keeled, entire or distally ciliate;

ligule of short hairs complete;

blades narrowly linear, 1–3 mm wide, flat, margin scabrid-ciliate.

anthelae simple or compound, longer than wide;

scapes wandlike, nearly terete or slightly compressed, distally 1 mm thick, marginal ribs scabrid;

longest primary involucral bract shorter than panicle.

anthelae compound, mostly diffuse, mostly turbinate, as broad as long, ascending-branching;

scapes filiform to linear, distally variously compressed, sometimes alate, 0.5–1.5(–2) mm wide, edges scabrid;

primary involucral bract usually 1, blade exceeding or exceeded by anthela.

pale dull brown, lance-ovoid to cylindric-ellipsoid, 10–12 mm;

fertile scales ovate, 3.5–4 mm, apex broadly acute, ciliate, surface uniformly puberulent, midrib excurrent as mucro or cusp.

red-brown or brown, mostly narrowly lanceoloid to narrowly ellipsoid, 3–7 mm;

fertile scales lanceolate, keeled, 1.5–2 mm, narrowly acute, glabrous, midrib excurrent as mucro.

stamens 3;

styles 2-fid, flat, fimbriate.

stamens (1–)2;

styles 3-fid, slender, with 3angled base, glabrous.

dark brown, lenticular-obovoid, 1.5 mm, finely cancellate, with 20 or more longitudinal rows of horizontally rectangular pits per side.

pale brown, trigonous-obovoid, 0.5–0.7 mm, apiculate and 3-ribbed, smooth to variably warty.

= 20.

= 10.