1 fallow polys tetypus / 60 81 Bouteloua trifida sp. nov. Spikes almost 4. Observed many flowered - sphalels 2 flowered, glumes very acute often 1/3 longest minutely hisp & aristate, glabrous! lower fl. hermaph. lower palea 2 flowered. lower gl. hermaph. lower palea 2 flowered. lower gl. hermaph. lower palea slightly pubescent! Observed 3 and coniceous, almost puleusent!! almost 3 and coniceous. almost pubescent! Observed 3 and coniceous, almost pubescent! Oscured 3 and coniceous, almost pubescent! terminating in 3 awns 3 times its length. Upper palea equaling the lower, mucronate, imperfect flower of 3 aristae, long pediciled. Nos 2020 & 2022 Wright (749 - cd/49); Rio Grande, near Elan Grande, Schott; also Nos 167 - 142] Berlandier col. Perennial. caespitose, culms 5-10