540 INDEX TO AMERICAN BOTANICAL LITERATURE 
Braun, E. L. The physiographic ecology of the Cincinnati region. 
Ohio Biol. Surv. 21: 115-211. f. 1-59. Je 1916. 
Briggs, L. J., Jensen, C. A.. & McLane, J. W. Mottle-leaf of Citrus 
trees in relation to soil conditions. Jour. Agr. Research 6: 721-740. 
bl. H, 906,97 +f. 1-4. 7 Au 1916. 
Britton,E.G.  Clethra alnifolia. Sweet pepperbush. Addisonia1: 23 
pl. 12. 30 Je 1916. 
Britton, E.G. A national flower. Jour. N. Y. Bot. Gard. 17: 104-106. 
5 Au 1916. 
Britton, E.G. Wild-flower Preservation Society of America. Torreya 
16: 182, 183. Au 1916. 
Britton, N. L. Exogonium microdactylum. Slender red Exogonium. 
Addisonia 1: 33, 34. pl. 17. 30 Je 1916. 
Britton, N.L. Opuntia macrorhiza. Large-rooted prickly pear. Addi- 
sonia I: 37, 38. pl. 19. 30 Je 1916. 
Bush, B. F. The mosses of the Pech catalogue—Missouri. Bryologist 
1g: 52-60. 25 Jl 1916. 
Campbell, D. H. The fern-flora of Cinchona. Science II. 43: 917, 
918. 30 Je 1916. 
Child, C. M. Axial susceptibility gradients in algae. Bot. Gaz. 62: 
89-114. 15 Au 1916. 
Church, M. B. The development of the embryo sac and embryo of 
Cooperia Drummondii. Bull. Torrey Club 43: 397-405. pl. 22, 23- 
22 Au I916. 
Cockerell, T, D. A. The northwestern Cytherea. Torreya 16: 184, 
185. Au 1916. 
Conzatti, C. Comentario al plan general de la clasificacién de los 
vegetales. Bot. Dir. Estud. Biol. 1: 281-283. Ja 1916. 
Cordero, M. Fermentacién diastasica del jugo del Agave. Bol. Dir. 
Estud. Biol. 1: 302-308. Ja 1916. 
Corrie, L. G. Pollinating fruit trees. Jour. Heredity 7: 365-369- 
J. 10, An ioi6. 
Coulter, J. M. Inheritance through spores. Proc. Am. Philos. Soc. 
55: 344-347. Je 1916. ) 
Davis, B. M. Life histories in the red algae. Am. Nat. 50: 502-512. 
Au 1916, 
