D. glomerata: stems coarse, 1-2 feet high; leaves flaccid, rough on the edges; clusters of spikelets dense and ovoid, collected into a close spike of about an inch, or in a broken spike of several inches long, or on the branches of a short, more or less spreading panicle; each spikelet much flattened, ovate; glumes lanceolate, ciliated on the back. - Meadows, pastures, and waste ground. Fl. June, July.