14 
BULLETIN 57, HAWAII EXPERIMENT STATION 
SELECTION OF ROOTSTOCKS FOR "SEED" 
A hill of canna contains a heterogeneous lot of rootstocks. A 
single hill 18 months old contains rootstocks which have been dormant 
Fig. 7.— Subsurface types of canna seed: A, Second generation— note tapering shape and location of 
buds; B, first generation with only one bud remaining; C, first generation with eight buds 
for nearly a year and others which are just developing, the different 
types varying in weight from a few ounces to more than 2 pounds. 
Fig. 8.— Immature surface types of canna seed: A, Well-developed attached spikes; B, small 
attached spikes; C, buds; D, no visible buds 
Although the transition from one type of roots tock to another is 
gradual, the entire hill can be divided into a number of groups, each 
of which has distinct characteristics. 
