30 
BULLETIN" 61, HAWAII EXPERIMENT STATION 
place in parts of Hawaii, often prevents natural pollination and 
results in failure of the fruit to set. At such times some fruit may 
set without pollination, the result being seedless forms which are 
Figure 30. — Dwarfness is believed to be influenced by environment, although these 
two plants of the same age came from seed of the same fruit, indicating that 
dwarfness may be a mutating quality 
usually of poor quality. (Fig. 15.) The papaya will thrive on soil 
that is regarded as too shallow to be suitable for most other fruit 
trees. The papaya plant grows equally well in volcanic soil of either 
basaltic or tufa origin, particularly where it is in alluvial deposits 
