IDENTIFICATION OF GRASSES. 



29 



54. Polish wheat (Triticum polonicum; fig. 58). 



Collar broad, spiral, with claws, hairy on margins and claws ; ligule long, 

 acute, notched on top ; sheaths not hairy ; blades one-half inch wide, long, 

 sharp pointed ; nerves broad and prominent on upper surface. 



Fig. 57. — Barley (Hordeum sativum). Fig. 58. — Polish wheat (Triticum polonicum). 



It is difficult to find characters which will distinguish this grain from barley, although 

 there is considerable difference in the appearance of the two when growing. The claws 



Fig. 59. — Rye (Secale cereale). 



Fig. 60. — Durum wheat (Triticum durum). 



of Polish wheat are more slender than those of barley and may have rudimentary hairs 

 when viewed with a lens, while barley has none. The collar of Polish wheat is not so 

 broad and prominent as that of barley. 



