606 THE SMALL GRAINS 



presented, until we have something better, for those 

 who desire a working basis for further investigation : 



granulata, Nees, 



wild rice, 

 officinalis, Wall., 



wild rice. 



communis, Kcke., 



Oryza 



f utilissima, Kcke. 



sativa, L, cul- 

 tivated rice. 



large-kerneled rice. 



minuta, Presl., 



small-kerneled rice. 



glutinosa, Lour., 

 glutinous rice. 



0. coarctata, Griff., a brackish water species, 0. tri- 

 ticoides, Griff., and perhaps one or two others, are wild 

 species, but their relationships are not yet decided. 



As in the case of club wheats, the large-kerneled and 

 small-kerneled rices are here given specific rank agronom- 

 ically, for convenience. 



682. Common or large-kerneled rice. A large part 

 of the common rices are large-kerneled. In some varieties 

 the kernels are large in both dimensions, in some others 

 they are more than three times longer than broad, and 

 called slender rices. In measuring the caryopsis of 372 

 varieties of Burma rice, Kikkawa found that 103 varieties 

 belong to the group of medium sized, long-kerneled rices ; 

 that is, those having kernels more than twice and less than 

 three times longer than broad, and whose length X breadth 

 equals less than 19.5 sq. mm. and more than 15.0 sq. mm. 

 The prevalent color of the caryopsis of common rices is a 

 translucent waxy white, sometimes with a pale yellowish 

 or grayish tint. Other colors are pale green, reddish 

 brown, dark brown, and white with red or dark stripes. 



