North American collections of Aegilops triuncialis are from disturbed sites, mostly roadsides and railroads. The native range of the species extends from the Mediterranean area east to central Asia and south to Saudi Arabia. Specimens from the Flora region belong to Aegilops triuncialis L. var. triuncialis, in which the glumes of the apical spikelets have a 5-8 cm central awn flanked by shorter (1-3 cm) lateral awns, and the glumes of the lower fertile spikelets have 2-3 awns of 1.5-6 cm. In A. triuncialis var. persica (Boiss.) Eig, the glumes of the apical spikelets have a 2.5-5.5 cm central awn, and 2 lateral awns of 0.6-2.5 cm that are sometimes reduced to teeth; the lower fertile spikelets have 2 teeth, or 1 tooth and 1 awn to 1 cm long.