Elymus L.
Glumes not bulging on the back, up to 3 mm wide. Lemmas tapering into an awn or awnless. Spikelets usually with 3 or more florets. Perennials Elymus
Plants with long yellowish rhizomes. Lemmas awnless, 10 mm long. Spikelets 10–15 mm long, oblong, with 3–6 florets, sessile or almost so. Leaf blades stiff, flat, finely pointed, 2–7 mm wide. Perennial up to 1 m high. Usually on clay soils. Introd. from temperate N. hemisphere. English Couch Elymus repens
Plants tufted, some lemmas with awns