Nov. io, 1913 
Pubes cent-Fruited Species of Prunus 
177 
in the southern part of Brewster County, Tex., at about the southern 
extremity of the bow of the Big Bend of the Rio Grande. 
The description cites also one specimen from the Mexican Boundary 
Survey Collections, No. 338. As both specimens show only matured 
fruit, it is difficult to place this species with reference to Prunus 
minutijbra and P. microphylla , to which it appears to be nearly related, 
both in the character of the fruit and in the absence of stomates in the 
upper epidermis of the leaves. In its abruptly angled and thorny 
branchlets and nearly eglandular leaves (PI. XVI) it would seem to be 
most nearly related to P. minutiflora . Whether it will agree with the 
above species in the dioecious character of the flowers, small number of 
stamens partly placed on the face of the calyx cup and in the finely hairy 
inner surface of the cup can only be determined from complete material. 
It is provisionally placed in the subgenus Emplectocladus of Prunus. 
