BT aa 
INDEX TO AMERICAN BOTANICAL LITERATURE 513 
Cannon, W. A. Some cytological aspects of hybrids. Mem. Hort. 
Soc. N. Y. r: 89-92. [1904.] 
Chamberlain, C.J. Acorrection. Bot. Gaz. 38: 145. 18 Aurgog. 
Christman, A.H. Variability in our common species of Dictyophora. 
Jour. Myc. 10: ro1—1o8. 31 My rgo4. ‘ 
Claassen, E. List of the mosses of Cuyahoga and other counties of 
northern Ohio. Ohio Nat. 4: 157-160. 1 My 1904. 
Clark, A.G. An interesting specimen of Arisaema triphyllum Torr. 
Rhodora, 6: 163. 14 Jl 1904. [Illust.] 
Cockerell, T. D. A. A new Aypholoma. Journ. Myc. 10: 108, 109. 
31 My 1904. 
“1. pecosense sp. nov. 
Collins, J. F. Some interesting Rhode Island bogs. Rhodork, 6: 
149, 150. 14 Jl 1904. 
Collins, J. F. Some Maine mosses. Rhodora, 6: 145, 146. 15 Je 
1904. 
Cook, 0. F. Evolution not the origin of species. Pop. Sci. Mo. 64: 
445-456. Mr 1904. 
Cooley, G. E. Silvicultural features of Zavix americana. Forestry 
Quart. 2: 148-160. My 1904. 
Cowles, H.C. The work of the year 1903 in ecology. Science, II. 
19: 879-885. 10 Je 1904. 
Cresson, E.T. Buxbaumia aphylla L. Bryologist, 7: 51, 52. 2 
My 1904. 
Note on its occurrence near Philadelphia. 
Cushman, J. A. Notes on Micrasterias from southeastern Massachu- 
setts. Bull. Torrey Club, 31: 393-397- 4-7-3. 29 Jl 1904. 
Darbishire, 0. V. Observations on Mamillaria elongata. Ann. Bot. 
18: 375-416. pl. 25, 26. Jl 1904. 
Davis, B. M. Oogenesis in Vaucheria. Bot. Gaz. 38: 81-98. pi. 
6,7. 18 Au 1904. 
Davis, W. T. Botanical notes. Additions to the flora [of Staten 
Island]. Proc. Nat. Sci. Assoc. Staten Island, 9: 22, 23. 14 My 
Davis, W.T. Wolfia in the Clove valley. Proc. Nat. Sci. Assoc. 
Staten Island, 9: 19. 9 Ap 1904. 
ane, W. Preliminary lists of New England plants, —XVII. Rho- 
dora, 6: 151-161. 14 Jl 1904. 
De Vries, H. On artificial atavism. Mem. Hort. Soc. N. Y. 1: 
17-23. [1904.] 
