683 
disease in the field by plant pathologists. It has been 
suggested that this semi-resistant chestnut may form 
hybrids with our native chestnut which will be sufficient- 
ly resistant to make them valuable forest as well as nut 
bearing trees, and possibly fully resistant species of 
Castanea exist somewhere in China. 
Citrus spp. (Rutaceae.) 35690-700. Plants of citrus 
trees from the Government Gardens at Nagpur, and the Bo- 
tanical Gardens, Saharanpur, India. Received from Mr. R. 
S. Woglum, of this Department. This collection of lemon 
and citron plants was brought by Mr. Woglum on his return 
from India, where he went to study the insect enemies of 
citrus fruits and their parasites. They represent some of 
the finest Indian oranges, together with a seedless lemon 
and limes of good quality. For distribution later. 
Colocasiu sp» (Araceae.) 36057. Tubers of an arold 
from Mount Silinda, Melsetter, Southern Rhodesia. Present- 
ed by Dr. W. L. Thompson, American Board Mission in South 
Africa. "An arum, called here 'Amadumbe,' which we prize 
as a vegetable. I suppose it must be of the same family 
as the dasheen. This is the best by far, that we have 
here, though several other varieties are eaten." (Thomp- 
son.) For distribution later. 
Cotoneaster spp. (Rosaceae.) 35928-932. Seeds from 
Chile. Presented by Mr. W. F. Wight of this Bureau. Five 
species of cotoneaster, all bearing ornamental blue ber- 
ries, and of possible value for hedges in mild-wintered 
regions. For distribution later. 
Coumarouna odorata. (Fabaceae.) 35904. Pods of the 
Tonka bean from Solorzano Cacao Estate at Borburata near 
Puerto Cabello, Venezuela. Received through Mr. H. Pittier 
of this Bureau. "This tree was introduced less than 
twenty years ago as a tentative shade for cacao. When the 
first lot came into bearing it was found they were far 
more productive as a crop than even cacao itself (I was 
told that last year's crop sold at $500 per cwt . or $5 per 
pound), so the plantation has been extended along the foot 
of the hills all around the Solorzano Estate. As a shade 
tree, the species was not successful; it does not rise 
high enough to allow good ventilation, and its foliage is 
too dense. The leaves are smooth and composed of four 
leaflets on a winged petiole. The flowers are purplish 
pink and grouped together in short, rounded terminal ra- 
cemes. There is seldom more than one fruit to each ra- 
