TRITICUM 



"3 



T. polonicum (Polish wheat) is not a native of Poland, but occurs in Italy 

 and Abyssinia in Africa. It is cultivated to some extent in this country. 



T. spdta (spelt) is the oldest grain cultivated in Greece, Egypt, and the 

 Roman Empire. It is of slight economic importance in the United States. 



T. dicoccitm (emmer) is of some economic importance in this country, 

 especially in the Western States. 



T. durum (durum) varieties are also known as "goose," "wild goose," 

 and "macaroni" wheats. They are hard wheats, particularly adapted 

 Id the arid regions, where they are better yielders than aslivum wheats. 



Fig. 39. — Spikelets of the types of wheat, i, einkorn (Triticum monococ- 

 cura); 2, spelt (T. spelta) ; 3, emmer (T. dicoccum); 4, common bread wheat 

 (T. xslivum) ; 5, club wheat (T. compactum) ; 6, durum wheat (T. durum) ; 7, 

 Poulard wheat (T. turgidum) ; 8, Polish wheat (T. polonicum). About 

 natural size. 



Durum wheat resembles barley. Its heads are the longest among the 

 wheats. The grains are hard, glassy, often translucent and rather large. 

 T. lurgidum (Poulard wheat) is of little consequence in this country. The 

 spikes are quadrangular or rectangular in cross-section. There is a tendency 

 to form branching spikes, as in Alaskan and Seven-headed or Egyptian 

 varieties. Such varieties also go under such common names as Stoner, 

 iMiraile, Eldorado, Jerusalem, INIany-headed, Many-spiked, Wild Goose, etc. 



