EDIBLE CANNA IN WAIMEA DISTRICT OF HAWAII 
17 
stalk if developed must be either mature or dormant. To this type 
also belong mature rootstocks, the stems of which have never 
developed. 
Rootstoclcs with no visible buds. — In this group are placed the older 
rootstocks the visible buds of which have already developed into 
offspring. 
The several types of seed were planted in the experimental field 
July 10, 1924, and the resulting crop was harvested March 25, 1926. 
The hills were spaced 4 by 4 feet apart. Single hills were dug from 
the several plats from time to time for classification. Table 6 com- 
pares the yields and weights of single hills dug from the different 
plats at bimonthly intervals. 
Table 6. — Comparison in yield and weight of single hills dug from the seed- 
selection plats at bimonthly intervals 
Plat 
No. 
Kind of seed 
Date of harvest 
Number 
of root- 
stocks 
per hill 
Weight 
of hill 
Average 
weight 
per root- 
stock 
8 
Subsurface rootstock 
February, 1925 
April, 1925 
June, 1925 
22.0 
22.0 
19.0 
• 27.0 
56.6 
23.0 
26.0 
28.0 
41.0 
57.7 
18.0 
31.0 
Pounds 
14.5 
15.3 
14.1 
21.7 
36.5 
14.0 
19.5 
22.8 
35.2 
42.1 
11.0 
13.5 
Pound 
0.66 
Immature rootstock (two buds) 
.70 
.74 
1? 
August, 1925 
February, 1926 »— 
February, 1925 
April, 1925 
June, 1925.. 
.80 
.65 
.61 
Mature rootstock (dormant bud 1 * 
.75 
.81 
14 
August, 1925 
February, 1926 »„. 
February, 1925 
April, 1925 
June, 1925 
.86 
.73 
.81 
Detached spike.. 
.44 
IS 
August, 1925 
February, 1926 i... 
February, 1925 
April, 1925 
June, 1925 
48.0 
56.6 
12.0 
31.6 
36.7 
7.n 
.66 
.65 
Attached spike - 
17.0 1 6.5 .38 
23.0 15. f) .65 
16 
August, 1925 
February, 1926 »„. 
February, 1925 
April, 1925 
June, 1925.. 
August, 1925 
February, 1926 L.. 
February, 1925 
April, 1925 
June, 1925 
36.0 
39.3 
20.0 
23.0 
26.0 
44.0 
50.8 
15.0 
18.0 
25.4 
10.0 
12.0 
17.0 
29.0 
33.9 
6.5 
.50 
.65 
.50 
17 
Immature rootstock (secondary) 
.5k 
65 
66 
66 
.a 
18.0 , 7.5 .42 
19.0 : 13.8 .73 
August, 1925 
February, 1926 »___ 
29.3 
18.0 
.62 
1 Average of four hills. 
Table 6 shows clearly the initial depressing effect of two types of 
seed, namely, the detached spike and the secondary immature root- 
stock. It was not until June, 11 months after planting, that these 
two plats produced a vigorous growth. The differences in the results 
from the other types of seed are not pronounced and might easily be 
accounted for by individual hill variation. 
Taken as a whole the period from February to June was one of slow 
growth with a general tendency toward increase in average weight. 
Beginning with August, there is apparent a sudden renewal of growth 
resulting in large increases in both number of rootstocks and weight 
of the hill. With the exception of plat 8, the six months period from 
August to February, 1926, was one of comparatively slow grow r th. 
83065—28 3 
