2l8 



BOTANY OF CROP PLANTS 



which is about one-half the length of the kernel. The peri- 

 carp is thin. There is a single row of small, flat cells in the 

 aleurone layer. 



Types and Varieties of Foxtail Millet.- — Koernicke rec- 

 ognizes two main groups of cultivated millets belonging to 

 the species Chatochloa italica: 



Fig. 84. — A, grain of foxtail millet (Chaetochloa italica) with lemma and 

 palet attached; B, grain o£ same, embryo side with "hull" removed; C, grain 

 of same, side opposite the embryo; D and E, grains o£ pearl millet (Pennisetum 

 spicatum). X 10. 



I. ChcBtochloa italica maximum. — Heads long, open, 

 and drooping. This group has two subdivisions: (i) 

 varieties with short bristles, and (2) varieties with long 

 bristles. Here would be included Aino millet, German mil- 

 let, Golden Wonder millet, and Siberian millet. 



