Deciduous or evergreen, rhizomatous perennial grases. A few have attractive flowerheads, but most are grown for their usually blue-green or blue-grey foliage. Many are gown for turf or pasture grasses. Leaves are lance-shaped, flat, folded or rolled. Dense or open banched panicles of brownish-green. sometimes glaucous, spikelets borne from spring to summer.