COROCORO COPPER DISTRICT OF BOLIVIA 109 



dozen European Tertiary species in the Oligocene and 

 Miocene. 



The presence of a species of Dodonaea at Corocoro 

 would indicate much sunshine and probably a dry season 

 similar to that of southeastern Bolivia. The modern species 

 cannot exist on the Altaplanicie under present climatic 

 and topographic conditions and so far as I know it is only 

 found in Bolivia east of the Cordillera Oriental, although 

 nearer the Equator in Peru it is found in the interandean 

 valleys. 



Order MYRTALES 



Family COMBRETACE^E 



Genus Terminalia LINNE 



Terminalia singewaldi BERRY 



PLATE VII Fig. 13. 



Terminalia singewaldi Berry, Proc. U. S. Natl. Mus., vol. 54, 

 p. 157, pi. 1 8, fig. 7, 1918. 



Description. Samaras bialate, reniform in outline, wider 

 than high, deeply emarginate or cordate at both the apex 

 and the base. Peduncle stout, about as long as the vertical 

 axis of the fruit. Length of the latter, 1.25 cm. Wings 

 thin with entire margins. Veins thin, numerous, some- 

 what flexuous, frequently forking, and less frequently 

 anastomosing. Height of wings, between .2.25 and 2.5 cm. 

 Width, about 1.25 cm. Width from margin to margin of 

 the opposite wings, about 3.15 cm. Essential part of 

 fruit turbinate, rounded distad, and tapering downward 

 proximad to join the peduncle ; turgid, the veins of the 

 wings crossing its surface diagonally. 



This species apparently belongs to the section Diptera 

 of the genus. It is somewhat similar to Terminalia antiqua 

 Britton, which is so common at Potosi, but differs from 

 the latter in its larger size, in its turgid and turbinate, 

 distally rounded seed cavity, and in its more equilateral 



