Description
Key Characters:
Growth Form:
Low to moderately tall annuals or perennials, rhizomatous or stoloniferous.
Stems:
Culms (stems) slender, hollow.
Roots:
Fibrous root system.
Leaves:
Leaves simple.
Alternate, distichous.
Blades ± linear, flat, folded, or involute, nonauriculate.
Margins entire.
Sheaths open; ligule membranous, puberulent.
Stipules absent.
Flowers:
Flowers in inflorescence an open or contracted and spikelike panicle.
Spikelets 1–flowered, small, slightly laterally compressed, rachilla usually not pubescent, disarticulating above glumes, but sometimes prolonged behind the palea as a slender pubescent bristle; glumes thin, lanceolate, acute to acuminate, sometimes the first glume aristate or short-awned, subequal or equal, both usually 1–nerved, the nerves usually scabrous, usually exceeding the lemma in length; lemma thin, (3–)5–nerved, lateral nerves usually prolonged as minute teeth beyond the obtuse or truncate apex, ± dorsally awned, the awn usually geniculate when long, callus glabrous or minutely bearded; palea absent or vestigial to nearly as long as the lemma, nerveless or 2–nerved.
Stamens 3.
Ovary superior.
Fruit:
Caryopsis narrowly oblong; loosely enclosed by the lemma; glabrous.
Ploidy:
Habitat:
Elevation Range: