31 
Form 7, pentandria. It will be observed from the description 
that this differs from forbesii in only two particulars, (a) The 
flower clusters of pentandria are short as in elongata, while those of 
forbesii are long. This, as has been indicated, is a very minor 
difference, (b) Pentandria in its purest state produces no pistillate 
flowers. However, it is highly probable that there are specimens 
of forbesii which produce only staminate and hermaphrodite flowers. 
It naturally occurs to one to inquire whether pentandria has been 
derived from forbesii by the shortening of the flower clusters, or 
whether pentandria is the more primitive form. In the literature of 
the subject, the only reference that has been found to a form, similar 
to that described, is by Andre, who mentions a variety as found by 
him in the Andes of Ecuador, in the identical garden where he dis- 
covered the "Chamburo" form (see p. 29). It will be recalled that 
this was in a high altitude. He says of this second form that it is 
"smaller with a ribbed fruit of a wholly new appearance," different 
from anything that he had seen elsewhere. It is there known as 
''Chiloacan." It seems not improbable that this is identical with 
the form pentandria which has been described as found in Hawaii. 
The high Andean altitudes may probably be regarded as the 
home of the form, for although Andre found it in a garden, it has not 
been recorded from other sources which can be regarded as its native 
habitat. How it came to Hawaii can not be determined, for travelers 
from these islands have brought or received seeds from almost all 
tropical and subtropical countries. 
Forms 8 and 9 may perhaps be regarded as the results of the cross- 
ing of the other forms. 
Form 11, ernstii. This it will be seen combines the characters of 
the ordinary pistillate and those of the elongata. It is well-known 
that seeds from the hermaphrodite flowers of elongata yield many 
pistillate plants as well as hermaphrodites and some coenomoncecious 
individuals. It is not surprising that a form should be found com- 
bining the female and hermaphrodite characters. 
Form 12. The above remarks apply equally well to form 12, 
which differs from the last only in the possession of staminate flowers 
which are normal to hermaphrodites. 
Form 13. Reference has been made to the manner in which this 
appeared. 
ORIGIN OF THE DKECIOTJS CARICA PAPAYA. 
The dioecious Carica papaya, being the one most widely known 
and described and considered as the normal type of the specie, 
been the subject of the most speculation and study as to its 
origin. As to its native habitat it is now generally conceded to be 
of American or Antillean origin. Some writers have regarded it as 
