野大麦别名菜麦草、大麦草、野黑麦,主要分布在东北、华北、内蒙古、青海、新疆等省区,为禾本科大麦属多年生草本植物,须根稠密,常具短根茎,茎直立或基部膝曲、具2—5节,疏丛型,叶长5—16厘米、宽2—6厘米、绿色或灰绿色,叶舌较短,高50—80厘米,穗状花序长5—10厘米、宽2—6厘米、常四棱形、紧密、绿色、成熟时带紫色,成熟穗轴易逐节断落,穗序上每节有小穗3枚,两侧为有柄小穗,通常较小、不孕或为雄性。 Wild barley alias lettuce, barley grass, wild rye, mainly in the northeast, north China, Inner Mongolia, Qinghai, Xinjiang and other provinces and regions, for the grass barley is a perennial herb, fibrous roots, often with short rhizomes, stems erect or Base geniculate knee, with 2-5 segments, sparse constricted type, leaf length 5-16 cm, width 2-6 cm, green or gray-green, ligule shorter, height 50-80 cm, spikes 5-10 Cm, 2-6 cm wide, often quadrangular, dense, green, purple when mature, easily cut off ripe spike axis, spikelets per section on the spike 3, spikelets on both sides of the handle, Usually smaller, infertile or male.