23 
have received duplicates for determination of all his West Indian 
and Central American collections, and Dr. George N. Best has 
continued to examine and report on all the Leskeaceae sub 
mitted . him for study. 
R. S. Williams has devoted much time to studying the col- 
ree made by him in Bolivia and has extended his studies 
extensive collections by C. G. Pringle and Jared G. Smith in 
Mexico, Percy Wilson in Honduras and W. R. Maxon in Costa 
Rica having been submitted to him for determination. 
Before the death of Professor Underwood his collections of 
hepatics had been purchased for the Garden and these with the 
Mitten specimens and the Austin Herbarium have been arranged 
so that they are available to students of these groups in the room 
where Dr. Howe can give them personal supervision. Miss C. 
C. Haynes has availed herself of this privilege and for several 
years has devoted her time during the winter to naming miscel- 
laneous collections from various parts of the United States in 
connection with her work as Hepatic Curator of the Sullivant 
Moss Chapter. 
Occasional visits are made by Dr. Evans, of Yale University, 
who is engaged in a critical study of the Hepaticae, and he has 
with great patience and care named all the collections of hepatics 
thus far made by the various explorers sent out by the Garden. 
He is planning to devote several months to the arrangement of 
the Mitten collections of hepatics, in exchange for which he will 
have the privilege of selecting duplicates for the herbarium of 
Yale University. ELIZABETH G. BRITTON 
THE SPREAD OF THE CHESTNUT DISEASE.* 
The disease of our native chestnut, discovered in Bronx Park 
in 1905 and described in the JourNaL for June and for Septem- 
* Murrill, W. A. A serious chestnut disease. Jour. N. Y. Bot. Garden 7: 143- 
153. f 17-zg. June, 1906. ; 
Merkel, H. W. “A deadly eae on ie American chestnut. Ann. Rept. N.Y. 
Zoél. Society 10: 97-103. 1906. (Illu: & 
urrill, W. A. aes remarks on u serious chestnut disease. Jour. N. Y. © 
Bot. Garden 7: 203-211. f. 25-30. September, 1906. 
Senin W. A. A new chestnut disease. Torreya 6: 186-189. f. 2, Septem- 
er, 1906 
