1722 
Blackberries and Raspberries Recently Introduced from 
Centra! and South America , 
"The explorations in Central and South America, 
which were carried on by the Office of Foreign Seed 
and Plant Introduction between 1916 and 1921, with the 
primary object of making a thorough study of the wild 
and cultivated avocados and securing the most prom- 
ising ones for trial in those sections of the United 
States where this fruit can be grown, have resulted in 
securing, in addition to about thirty-five new avoca- 
dos and several interesting relatives of this fruit, 
a number of other useful plants which promise to be 
of value to our agriculturists and horticulturists. 
"Among the most interesting of these miscellane- 
ous plants may be mentioned the several species of 
Rubus obtained in Guatemala, Costa. Rica, Colombia, and 
Ecuador. Two or three of these appear very promising 
for cultivation in our southern and western states; 
others are interesting mainly from the standpoint of 
the plant breeder, who is likely to find in them char- 
acters which, when combined with our northern species, 
will prove of great value. 
"Notes regarding these species have appeared in 
previous issues of Plant Immigrants. At the time when 
these notes were published, however, some of the spe- 
cies were still unidentified. Furthermore, the obser- 
vations were all made in the field by one not famil- 
iar with the genus Rubus from the plant breeder's 
standpoint . 
"In company with George M. Darrow, of the Office 
of Horticultural and Pomological Investigations , Bureau 
of Plant Industry, I have recently gone over the her- 
barium material of all the species which I collected 
in Central and South America, Mr. Darrow is devoting 
most of his time to breeding work with the genera Ru- 
bus and Fragaria, and has been particularly interest- 
ed in securing as many species of Rubus as possible, 
for crossing with our northern blackberries and rasp- 
berries. 
"The following notes made by Mr. Darrow and my- 
self may be of interest to others who are devoting 
attention to this important genus of plants: 
"Rubus adenotriehos Schlecht. S. P. I. Nos. 49331, 
51123, 53219,53995, 54279,54280. Collected in several 
countries, from Guatemala to Ecuador. In the latter a 
white-fruited form was obtained (S. P. I. No. 54280). 
