Schizachyrium 裂稃草屬
型態特徵
Annuals or perennials; culms hollow. Ligule short, truncate, ciliolate; blades flat or rolled, acute or obtuse, not narrowed at base or with short pseudo-petiole, margins revolute when dry, and often discoloring to a rusty-red or scarlet. Inflorescence a spike-like raceme, usually few-jointed, terminating flowering-twigs consisting of a raceme, peduncle, subtending leaf, and next-lower internode. Spike-in alternate pairs, dimorphic, 1 pedicelate, 1 sessile, dorsiventrally arranged. Sessile spikelets oblong, usually dorsally compressed, falling with adjacent pedicel and joint of rachis; lower glume as long as spikelet, usually coriaceous, margins incurved to inflexed, shortly 2-toothed at apex, nerves 5-7 or nerves obscure muticous or with short subula, not keeled or with 2-keels, and these sometimes excurrent into very short awns; upper glume ca. as long as lower glume, boat shaped-keeled, membranaceous, 1-nerved, muticous; lower lemma shorter, thinly membranaceous, nerveless or 2-nerved; lower palea absent; upper lemma deeply divided into acute narrow lobes, thinly membranaceous, with a geniculate awn from sinus: upper palea wanting; lodicules 2, cuneate, apex emarginate; stamens 3; styles 2, free. Caryopsis linear-oblong to spindle shaped. Pedicelate spikelets well-or poorly developed.
About 50 species in the tropics worldwide; two taxa with one variety in Taiwan.
