194. Polytrias Hackel in Engler & Prantl, Nat. Pflanzenfam. 2(2): 24. 1887.
单序草属 dan xu cao shu
Authors: Shou-liang Chen & Sylvia M. Phillips
Aethonopogon Kuntze; Eulalia sect. Polytrias (Hackel) Pilger.
Perennial, low, stoloniferous. Leaf blades broadly linear; ligule short, truncate, ciliolate. Inflorescence a single terminal raceme; raceme hairy, fragile, densely spiculate, the spikelets borne in threes, 2 sessile and 1 pedicelled at each node, sessile and pedicelled spikelets similar, both fertile or pedicelled spikelet male or barren, occasionally lowermost spikelets paired; rachis internodes broadly linear, densely ciliate on margins, shorter than spikelets; pedicel similar but more slender. Spikelets oblong; callus bearded; glumes cartilaginous becoming membranous in upper 1/3; lower glume flat, villous, flanks keeled, clasping upper glume, obscurely 2-veined between keels, apex truncate, ciliate; upper glume slightly longer than lower, 1–3-veined, keeled along midvein; lower floret absent; upper lemma small, broad, 2-cleft, awned; awn geniculate; palea very small or absent. Stamens 3.
One species: SE Asia, including China.