312 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



the two large globose stigmas coherent. Stipe of fruit 2 em. 

 long ahove tlie bracts, stout, annulate. Fruit nearly 1 dm. long, 

 8 cm. broad, regularly ellipsoid but umbilicate at the base, gla- 

 brous, edible, the epicarp soft. 



Rurrenabaque, 1,000 feet, H. H. Ritshij, December 1921 (with- 

 out number). Species very near P. riparia Mart, for which it 

 was at first mistaken. It appears to produce the largest edible 

 fruit known in the genus, and one that is highly esteemed by the 

 natives of the region where it grows. 



Papaya CEAE 



Jacaratia boliviana 



This species was described (Rusby, Bull. N. Y. Bot. Gard. 

 8: 107. 1912) from specimens collected by Mr. R. S. Williams at 

 Charapampa, Bolivia, in late September 1901. These specimens, 

 staminate only, were in flower, and no information regarding the 

 fruit was obtained. In late November, 1921, the species was 

 again collected {no. 1877) by Mr. Martin Cardenas, a member of 

 the Mulford Exploration party, at Rurrenabaque, at a some- 

 what lower altitude, the specimens bearing fruit nearly, if not 

 quite mature. In the young state, the fruit is obovoid, with 

 tapering base and acutish summit. As it approaches maturity, 

 it fills out at both base and summit, and approaches the ellix>- 

 soidal form, although the base remains a little narrower than 

 the summit, even in my largest specimen. This, in the pressed 

 and dried state, is about 8 cm. long, by nearly 4 cm. wide. It 

 bears a short annulate stem, nearly as thick as long, and the 

 subsessile black stigma. The color of the fruit is light-yellow, 

 although it may be darker at full maturity. It is known locally 

 as "Papaya del Monte," or Wild Papaw, and is said to be 

 edible. 



COMBRETACEAE 



Combretum vernicosum 



Young branchlets and inflorescence and lower leaf-surfaces 

 closely puberulent and slightly rough, the upper leaf-surfaces 

 strongly lustrous. Branchlets rather stout, terete, very leafy. 



