22 
with those of the ordinary male tree and the pistillate with those of 
the female tree, but the hermaphrodite differ from those described 
above (form 3) . These have a very much shortened corolla tube, as 
in the case of the pistillate flower, the lobes being divided almost to 
the base of the ovary. On the edge of this short tube, quite near the 
base of the ovary, are attached only five stamens, and these are sup- 
plied with long filaments, which rest in furrows between the lobes 
of the ovary. These lobes are united at the base, but often separable 
at the upper ends. The resulting fruit is deeply furrowed. 
This form of the papaya has not been seen in Hawaii by the writers, 
although thousands of plants have been under observation at the 
experiment station and in other parts of the islands. This is rather 
remarkable when it is remembered that the next form closely resem- 
bling it is not at all rare in Hawaii. 
Form 7. Pentandria. This form produces hermaphrodite flowers 
of the same type as those just described (form 6). They have the 
corolla tube reduced to almost negligible length and the 5 stamens 
inserted on long filaments on this tube, near the base of the ovary 
(PI. VIII, inset). The ovary is deeply furrowed, with the stamens 
lying in the grooves between the lobes, thus giving rise to a deeply 
furrowed fruit. There are also staminate flowers of the ordinary 
type, and these are born with the hermaphrodite in short clusters as 
in the case of form 4. 
Form 8. This is the coexistence of the forms 4 arid 7 in the same 
plant (PL VIII). The staminate flowers of the cluster are the same 
as in all cases, but the two forms of hermaphrodite flowers occur side 
by side in the same plant and give rise to correspondingly different 
fruits. 
Form 9. Intermediates. Here, in still other monoecious or her- 
maphrodite plants, are to be found almost all possible combinations 
of the characters of hermaphrodite flowers of the forms 4 and 7 
(PL IX, fig. 1). The corolla may be intermediate in form between 
the long tube and the short. The stamens may be long, short, or 
intermediate, and may be attached at any one of several points on 
the corolla or even on the lobes of the ovary. The stamens may be 
from Hve to ten in number. The ovary is often misshapen, the lobes 
being only partly united, resulting in a distorted fruit. Occasionally 
a flower may be of the form 4 on one side and of the form 7 on the 
other. 
Form 10. A curious andromonoecious form has recently been 
observed at this station. Many hermaphrodite flowers of various 
characters, as described above, are found on the plant, but the most 
curious character is the bearing of ovules on the stamens of some of 
these hermaphrodite flowers. With respect to its long peduncles 
