v] Ergot and Clover Sickness 57 
In appearance they are not unlike small thin date 
stones, but they are rather darker in colour. A cut 
across one of them shows that only the outer layer is 
Fig. 19. Cocksfoot and rye grass attacked by Claviceps purpurea. 
dark in colour, the interior being whitish, resembling 
very closely a cut grain of rye. Each sclerotium 
consists of hyphae matted tightly together and running 
in all directions, so that sections across it in any direction 
