Leptochloa aquatica Scribn. & Merr.

Leptochloa aquatica Scribn. & Merr. Bull. U. S. Dep. Agr Agrost. 24: 26. 1901.
Annual; culms erect, or decumbent at the base and rooting at the lower nodes, branching, 15-55 cm. long, glabrous; sheaths keeled, glabrous, mostly longer than the internodes; ligule 1 mm. long, truncate, minutely erose; blades flat, rather thin, 5-22 cm. long, 4—8 mm. wide, glabrous or scaberulous, the margins scabrous-serrate; inflorescence 5-18 cm. long, 2-3 cm. wide, with several to numerous ascending or appressed approximate spikes, the lower ones 2-6 cm. long; spikelets lead-colored, 3-5-flowered, 4-5 mm. long; glumes acute, scabrous, the first 1 nun. long, the second broader, 2 mm. long; lemmas 3 mm. long, acute or subobtuse, awnless, pubescent on the margins and along the midnerve in the lower half.
TvPB locality: Cuemavaca, Morelos (Pringle 6664).
Distribution: Shallow water and along ditches, Morelos, MichoacAn, and Jalisco.