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.

polystichous, spreading to ascending, to 1/2 length of culms or longer;

sheaths entire or ciliate distally, backs hirtellous;

ligule absent;

blades linear-filiform, 0.5 mm wide, flat or involute, scabridciliate, often abaxially hirtellous.

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 simple or compound, mostly open, ascending-branched, mostly longer than broad;

scapes filiform, 0.5 mm wide, distally compressed, mostly glabrous;

longer involucral bracts leafy, equaling or exceeded by 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.

greenish brown or brownish, lanceoloid or narrowly ellipsoid-cylindric, 4–5 mm;

fertile scales ovate, acute, glabrous, midrib excurrent as slender, excurved cusp.

stamens (1–)2;

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

stamens 1;

styles 2-fid, slender, base flat, long-fimbriate, hairs recurved over achene summit.

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

pale brown, lenticular, obovoid, 0.9 mm, smooth or very finely reticulate.

= 10.