21 
As experiments have proceeded, however, it has been discovered 
that the pollen from such staminate flowers, except in the case of one 
tree, failed to fecundate any pistils up to the present time, and it has 
boon applied to every type of pistil found in the station collection. 
Since these flowers apparently do not function it seems incorrect at 
present to apply to this form of the papaya the term monoecious. 
They may rather be termed either pseudomonoecious or hermaphro- 
dite. These remarks anticipate, to some extent, facts which will be 
brought out later, but are made here as an explanation of the change 
in terminology. 
To proceed further with the description of this form, it is to be 
noted that the two types of flowers are found in the same cluster, as 
was true in the last form described, but in the present case the inflores- 
cence is much shortened, being generally from 3 inches to 6 inches long. 
After the tree attains sufficient maturity a flower cluster is usually 
formed in the axil of each leaf, but on some trees many of these 
clusters produce only the staminate flowers. Not infrequently 2 
feet or more of the trunk may yield no hermaphrodite flowers and 
consequently no fruit, leaving that portion of the trunk bare after 
the flowers have fallen (PL VII, fig. 1). There may be one or several 
bisexual flowers in each cluster, resulting in fruit. The fruit from 
this hermaphrodite flower inclines to be elongated, cylindrical, and 
pointed at the outer end, but the shape varies as in all papayas. 
The form which Correa de Mello and Spruce mention as "Chamburu" 1 
and which they found in the equatorial Andes, appears to be very 
similar to this and may perhaps be identical. 
Form 5. Sterile hermaphrodite. This may be regarded as an 
extreme case of unproductiveness of the form just described. It has 
been represented by only one tree, so far as known. This has pro- 
duced no fruit. A few hermaphrodite flowers were found, but none 
matured fruit (PL VII, fig. 2). The pollen of staminate flowers was 
unfertile. 
Form 6. Forbesii of Solms-Laubach. Forbes 2 describes a ceeno- 
monoecious 3 form which he found at Bantam, Java, and which 
resembles, yet is quite different from, the form correse described 
above (form 3) . Solms-Laubach later described the same form 4 
which he found in another part of the same island. To this he applied 
the name forbesii. Briefly stated, the most striking characters of 
this plant are as follows: On the long, pendulous peduncles, charac- 
teristic of the male tree, this plant produces its three types of flowers, 
staminate, pistillate, and hermaphrodite. The staminate are identical 
i Jour. Linn. Soc. [London], Bot., 10 (1869), p. 11. 
* H. O. Forbes. Jour. Bot. [London], n. ser., 8 (1879), p. 313. 
» Having male, female, and hermaphrodite flowers on the same plant. 
* Bot. Ztg.,loc. cit. 
