Flora of North America species comparison

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.

nearly distichous, ascending, 1/2–3/4 length of culms;

sheath margins ciliolate, adaxial surface sparsely to copiously hirtellous distally;

ligule present, complete;

blades narrowly linear, 2–4(–5) mm wide, flat to shallowly involute, margins ciliate-scabrid, abaxial surface pilose-hirsute.

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.

anthelae compound, ascending-branched, longer than broad;

scapes distally oval or flattened, glabrous to pubescent;

longest involucral bract exceeding anthela.

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.

rusty brown, lanceoloid, 4–6 mm;

fertile scales broadly ovate to nearly orbiculate, 2–3 mm, broadly acute, midrib excurrent as mucro or cusp.

stamens (1–)2;

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

stamens 2;

styles 2-fid, flat, fimbriate.

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

pale to dark brown with pale umbo, lenticular-obpyriform, 1.7–2 mm, finely pitted, appearing nearly smooth, the pits in at least 20 narrow vertical rows per face.

= 10.

= 10.