IDENTIFICATION OF GRASSES. 



29 



54. Polish, wheat (Triticum polbnicum; 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. 



