Plate 19. 



No. 28. 



Sib Plantain. 

 {Plantago lanceolata.) 



Xo. 29. 



Sard or Blackheads, or Knapweed. 

 {Centaur ea nigra.) 



No. 30. 



Hattle in Seed. 

 {Rhinanthus crista-galU.) 



