BOTANY OF CROP PLANTS 

 Repeated Germination 



Classification of the Types of Wheat. — Hackel divides the 

 genus Triticum into two sections, Aegilops and Sitopyros. 

 In the first, the glumes are flat or rounded on the ba;ck; in 

 the second, keeled. T. ovata is the principal species in the 

 Aegilops section. It occurs in southern Europe, as far east 

 as Turkestan in Asia. The cultivated wheats belong to the 

 Sitopyros section. 



Fig. 37. — A, split palet of einkorn (Triticum monococcum) surrounding the 

 grain; B, glume of einkorn; C, glume of club wheat (T. compactum). • X 5- 



Key to Economic Types of Wheat 



Spikelets two-flowered, one sterile, one fertile; terminal spikelet aborted; 

 lateral teeth of glumes acute (Fig. 37); palet dividing lengthwise when 

 mature. T. monococcum iehakotn). 



