GRASSES OF BRITAIN. 169 



Explanation of Plate LXXIII. Knappia agrustidea^ natural size. 



Fig. 1. Spikelets and rachis. 



2. Spikelet showing the two glumes and floret 



3. Floret of onlv one palea. 



4. Palea opened. 



5. Ligule. 



6. Ovarium, pistils, and stamens. 



