597 
ily crosses with the latter and spoils the corn crop, which is 
the staple agricultural crop of this district. It is reported 
that the natives have made 'tortillas' from the ground seed of 
the teosinte, but such instances are very rare." (Hamm. ) For 
distribution later. 
EUGENIA MATO. (Myrtaceae.) 33958. Seeds of a Eugenia 
from Buenos Aires. Presented by Dr. Carlos Thays , Director, 
Botanic Garden. "A tree with edible fruits, forming the prin- 
cipal part of the forests in the vicinity of Tucuman in Argen- 
tina." (Venturi, Trees of Argentina.) For distribution later. 
EUGENIA PUNGENS. (Myrtaceae.) 33959. Seeds from Buenos 
Aires. Presented by Dr. Carlos Thays, Director, Botanic 
Garden. A hard-wooded tree, from the province of Sao Paulo, 
Brazil, which bears edible fruits. For distribution later. 
EXOGONIUM PURGA. ( Convolvulaceae . ) 33961. Seeds of the 
jalap from Buenos Aires. Presented by Dr. Carlos Thays, 
Director, Botanic Garden. "A Mexican climbing plant, with 
salver-shaped purplish flowers, which furnishes the true jalap 
tubers of commerce. These are roundish, of variable size, the 
largest being about as large as an orange, and of a dark col^ 
or. They owe their well-known purgative properties to their 
resinous ingredients, and hence worm-eaten tubers are more 
valued than sound ones, as the insects eat the farinaceous and 
woody portions of the tuber and leave the resin." (Masters, in 
Lindley, Treasury of Botany.) For distribution later. 
GOSSYPIUM HIRSUTUM. (Malvaceae.) 34289. Seeds of Cam- 
bodian cotton from Coimbatore, India. Presented by R. Cecil 
Wood, Esq., President Agricultural College, through Mr. C. V. 
Piper. "This cotton has a close resemblance to the American 
Upland type and has been looked upon as an American cotton 
that has been acclimatized in Cambodia, though this may not 
prove to be the case. There is historical evidence of the 
introduction of a superior type of cotton from Siam to Louisi- 
ana in early days, and this may have been the origin of the 
long staple varieties formerly grown so extensively in the 
Delta regions of Louisiana and Mississippi. Thus the Cambodia 
cotton may prove to be related to the American long staple 
type. A variety of Upland cotton from Cochin China was stud- 
ied in Egypt in 1910, which may prove to be similar to the 
present importation. An account of this cotton was published 
in Bulletin No. 210 of this Bureau series under the title 
Hindi Cotton in Egypt. The Cambodia cotton has been grown for 
a few years in southern India and has given much better 
