Lolium L. >
Glumes 1, except 2 on the terminal spikelet. Spikelets sessile, alternate on a flattened rhachis Lolium
Spikelets linear to narrow-lanceolate, as broad as, or a little broader than the rhachis, not swollen at the fruiting stage, deeply embedded in the rhachis. Rhachis faintly zig zagged
Rhachis much flattened, rectangular in section. Uncommon. Rigid Ryegrass Lolium loliaceum