Lolium L. >

Glumes 1, except 2 on the terminal spikelet. Spikelets sessile, alternate on a flattened rhachis Lolium
Glume shorter than the spikelet (less than half to two-thirds the length)
Lemmas awnless. Spikes 7–25 cm long. Spikelets with 3–12 florets. Perennial up to c. 50 cm high. Widespread. Pastures; garden weed. Introd. from Europe and Asia. Fl. winter–spring (Hybrids between this species and L. rigidum occur). Perennial Ryegrass Lolium perenne