22 
BULLETIN 61, HAWAII EXPERIMENT STATION 
the plant. Iorns (10, p. 125), who studied the question in Porto 
Rico, reached the conclusion that other conditions than the loss of 
the terminal bud must be present to induce a change of sex. Kul- 
karni (12, p. 103), from investigations in India, came to the con- 
clusion that change in sex is not in any way connected with the 
removal of the terminal growth. He found that the male plants in 
the course of their development may present a number of different 
sex combinations, practically all of which have since been observed 
at the Hawaii station and are described in this bulletin. 
Figure 22. — Papaya with thick flesh, a good type for general use if desirable flavor 
can be maintained. This form is not an unusual variation 
On several occasions during the past eight years at the Hawaii 
station a number of staminate plants have been topped in an effort 
to change the sex, but in no instance has it been successful. 
METHODS OF PROPAGATION 
The papaya is propagated from seeds and by cuttings and grafts. 
Reproducing the plants from seeds continues to be the best and most 
commonly practiced method of propagation. Plants of both cut- 
tings and grafts have been grown to full maturity at the station, 
but none of them has been found to be vigorous or prolific in com- 
