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)

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Lemmas with a fine awn as long as the lemma (5–6 mm). Spikes 15–25 cm long. Spikelets with 10–20 florets. Annual up to c. 50 cm high. Widespread. Pastures; garden weed. Introd. from the Mediterranean. Fl. spring. Italian Ryegrass Lolium multiflorum

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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