18 



GRASSES OF IOWA. 



alternating in the same way. The kernels are somewhat imbricated in 

 the rows, and usually alternating, owing to one of the spikelets in each 

 pair being slightly pedicellate. They are small, ovate, somewhat flat- 



Fig. 11. a. Red Cuszco corn ; 1-4, views of kernels ; b, Calico Cuszco corn; 1-4, views of kernels. 

 c, White Spotted Cuszco corn; 1-4, views of kernels. (Charlotte M. King.) 



tened dorsally, and pointed, the lower part constricted by the closely 

 embracing glume. In structure they are hard and corneous, with a 

 central starchy layer extending from the base nearly to the apex. The 



