350 - 



POSITION OF MODE 



T TT T T 



350 



POSITION OF MODE 



TT T ( TT 



It IV V 



M 

 i I 



DIAMETERS 



Fig. 2 



15 MICRA 



t n i r 



oO 250 450 650 850 1050 1250 1450 1650 1850 2050 2250 2450 2650 2850 MICRA 



< hart 1. Curves showing the distribution of frequencies of the several lengths of the internodes and diameters for all of the five groups. Fig. 1, Internodes. Fig. 2. Diameters. 



