disarticulate

Plants usually with long rhizomes; spikelets usually disarticulating below glumes; lemma usually without distinct callus at base.

Glumes obscurely keeled proximally, indistinctly so distally; spike rachis usually tough and not disarticulating.

3 (2) Spikelets all sessile and similar in groups of 2 or 3 in regular, longitudinal rows; spike with rachis disarticulating.

Spikelets large, wedge-shaped, laterally compressed, florets several, rachilla disarticulating above glumes and between florets;

rachilla internodes usually distinct and usually disarticulating with florets, falling separately;

rachis tough, triquetrous or flattened, spikelets disarticulating from pedicels at maturity;

Spikelets with 1 floret, laterally compressed, disarticulating above glumes, rachilla shortly extended beyond floret, glabrous;

Leaf blades linear or linear-lanceolate, often in rolled when dry, lower blades usually disarticulating from the sheaths;

Spikelets with one floret, elliptic to narrowly oblong, straighter on one side, strongly laterally compressed, disarticulating from pedicel;

rachilla disarticulating below each floret, extension above floret(s) short or absent;

Spikelets laterally compressed, with 2 to several florets, disarticulating above glumes and between florets;

axis corky, disarticulating into segments at maturity;

Spikelets with 1 floret, bisexual, disarticulating above glumes;