Trisetum

a genus of perennial herbs of the family Gramin-eae. The inflorescence is a panicle; the spikelets are two- to five-flowered. There are about 60 species, distributed in nontropical regions of both hemispheres and in high-elevation tropics. The USSR has more than 15 species, growing in meadows, in glades, on rocky slopes, and in tundras. Many species are valuable hay and pasture plants. The species T. spicatum grows in the arctic and in the mountains of Siberia, Middle Asia, and the Far East. T. sibiricum is found in the European USSR, Siberia, Middle Asia, and the Far East; T. flavescens (formerly T. pratense) occurs in the European USSR, the Caucasus, and the Kopetdag.