WHEAT 



317 



In the United States durum wheat is produced princi- 

 pally in- North and South -Dakota, Minnesota, Nebraska, 

 western Kansas, Eastern Colorado, Wyoming and Montaha. 

 A small amoimt is grown in northwestern Texas. Oneva- 

 riety of durum 

 wheat has been 

 grown in Texas un- 

 der the name of 

 Nicaragua wheat. 



392. Polish wheat 

 (T. polonicum). — 

 This wheat is* grown 

 in southern Europe. 

 It is not a produc- 

 tive type, but is 

 thought by some to 

 be fairly well 

 adapted to the arid 

 districts of this coun- 

 try. In Polish wheat 

 the palea of the 

 lowest flower is only 

 half as long as the 

 flowering glume. In 

 common wheat the 

 palea is as long as 

 its glmne. 



393. Wheat varie- 

 ties. — More than 

 a thousand varieties of wheat are known. Most of these 

 belong to the type known as common wheat. From this 

 great number of varieties, not more than fifteen or twenty 

 are important in the cotton-belt. No very satisfactory 



Fig. 55. — Heads of some beardless winter 

 varieties of wheat: 1, Fultz; 2, Leap Pro- 

 lific; 3, Purple Straw; 4, Poole; 5, Mealy; 

 6, Dawson Golden Chaff. 



