CARBOHYDRATE METABOLISM AND GROWTH IN EDIBLE CANNA 17 
similar. Notwithstanding a distinct falling off in the quantity of 
both sugars in the loaves of young Group 3a, hill 2, the ratio was 
practically the same. 
Samples Xos. 19 to 22, inclusive, old Group 3a, hill 3, showed the 
same general composition and changes of sugars in transposition 
noted in hills 1 and 2. A number of significant differences occurred, 
however. The leaves were distinctly higher in sucrose but very low 
in hexose content. Sucrose continued to decrease in passing from 
midribs and sheaths into stem whereas in the mature plants of hills 
1 and 2 it always increased. The total sugars decreased sharply 
in passing from the leaves downward into the stem, whereas in hills 
1 and 2 the reverse was true. The rootstock was outstandingly 
higher in sucrose as compared with Group 3a, hill 1. The stem of 
Fig. 12.— The result of stunting. A, B, C, and D represent the first, second, third, and fourth genera- 
tions, respectively. Note the profusion of small, stunted "secondary" growth on all generations 
except the first 
the plant contained starch in appreciable quantities throughout, 
whereas the stems of the other hills, even in young Group 3a, hill 2, 
contained only traces of starch. 
Samples Nos. 23 to 28, inclusive, hill 4, from Waimea, showed the 
extreme variations occurring within a single hill. Samples Nos. 23 
and 24, the apical and basal parts of a rootstock the stem of which 
was practically dead, were very low in sucrose and hexose content. 
Both sugars increased greatly, particularly the hexose, in samples 
Nos. 25 and 26, a vigorous Group 3a rootstock. This increase con- 
tinued, the hexoses exceeding the sucrose, in samples Nos. 27 and 28, 
a vigorous Group 3b rootstock. In Groups 2 and 3a, the total sugars 
decreased in passing from the apical to the basal part, whereas, in 
Group 3b, they slight ly increased. The basal part of the Group 2 
35973—27 3 
