34 
BULLETIN 57, HAWAII EXPERIMENT STATION 
In harvesting edible canna considerable dirt, dead scales, and 
leaves adhere to the rootstocks and must be deducted from the gross 
weight in determining the net production of material for use in starch 
Fig. 18.— Juncture of stem and rootstock of canna. o Indicates the 
apex of the rootstock, the stem being characterized by parallel 
vascular bundles 
manufacture. Table 12 (p. 26) shows that the tare varies consider- 
ably from month to month. During the early part of the harvests 
the percentages ranged from 11 to 15.5, whereas later they varied 
from 8 to 9.9. The variations are due partly to the fact that har- 
