rarely annuals, with tufted or stoloniferous culms. Leaf-blades flat or
involute, ligule ciliolate. Inflorescence of spikes or spiciform racemes,
mostly subdigitate. Spikelets solitary, lanceolate-oblong, biconvex, biseriate
and secund along triquetrous rhachis; florets 2, lower neuter, upper perfect;
lower glume absent or suppressed, upper equal to spikelet, obscurely 4-5
nerved; lower lemma subequal to upper glume, lower palea absent; upper lemma
crustaceous, margins firm, incurved,
apex inrolled, upper palea equal or subequal to its lemma. Fruit a caryopsis.