GRASSES OP BRITAIN. XXVll 



chis. Glumes two, situated opposite to each other. Six species, 

 T. re-pens, T. canmum^ T. junceum^ T. cristatum^ T. sylvaticum, T. 

 pinnatum. 



LOLIUM. — Spikelets arranged singly on each side of the rachis, 

 with one glume, rarely two ; when the second glume is present the 

 outer glume is as long as the spikelet. Two species, L. perenne, L. 

 temidentum. 



N ARDUS. — Spikelets arranged on one side of the rachis. Glumes 

 wanting. One species, N, stricta. 



ROTTBOLLIA. — Spikelets arranged on both sides of the rachis. 

 Glumes two. One species, R. incurvaia. 



