Dimeria 觿茅屬
型態特徵
Annuals or perennials; culms hollow, glabrous. Ligule short, truncate; blades linear, acute, higher short. Inflorescence a solitary spike-like raceme, or composed of several such racemes. Spikelets solitary, subsessile, alternate along abaxial side of a tough, keeled rachis, usually with short-hairy bases, falling off entirely, usually awned; glumes herbaceous; lower glume narrow, conduplicate-keeled, 1-nerved; upper glume usually wider and often slightly longer; lower lemma small, often conduplicate, thinly membranaceous, nerveless; lower palea wanting; upper lemma convex or keeled, thinly membranaceous, 1-nerved, apex 2-toothed or 1-lobed, with geniculate awn from sinus or muticuous; upper palea small or wanting; lodicules 2, very small or wanting; stamens 2, with short filaments and small anthers; styles 2, free, short. Caryopsis. linear, compressed laterally, free, embraced by lemma.
About 40 species distributed in the Mascarine Islands, the Indo-Malaysian region, Polynesia and Australia; two species occasional in Taiwan.
