Trisetum
(from treis, three, and seta, a bristle; alluding to the three awns of the flower). Including Rostraria and Trichaete. ORD. Gramineae. A genus embracing nearly fifty species of hardy, perennial or rarely annual, tufted Grasses, broadly distributed over temperate and mountainous regions. Spikelets two (rarely three to six) flowered, often shining; glumes membranous, sub-scarious, or the flowering ones hyaline, the two lower ones empty; panicles sometimes densely spike-formed, ovate or oblong, sometimes lax and effuse. Leaves flat. T. flavescens, the British representative of the genus, is particularly useful for agricultural purposes. None of the species possess any horticultural interest.