24 INDEX TO AMERICAN BOTANICAL LITERATURE 
Britton, N. L. The cacti of Trinidad. Bull. Dept. Agr. Trinidad & 
Tobago 19: 81-87. 1921. 
Carano, E. Nuove ricerche sulla embriologia delle Asteraceae. Annali 
di Botanica 15: 97-196. pl. 4-12 + f. 1, 2. 28 F 1921. | 
Campbell, D. H. Professor H. Bruchmann. Science II. 54: 67, 68. 
22 Jl 19at. 
Campbell, D.H. The eusporangiate ferns and the stelar theory. Am. 
Jour. Bot. 8: 303-314. f. 1-7. 30 Je 1921. 
Campbell, D.H. Die Verbreitung gewisser Lebermoose der malaiischen 
Region. Jahrb. Wissensch. Bot. 56: 365-373. 1915. 
Chamberlain, C. J. Helmut Bruchmann. Bot. Gaz. 72: 45-47. 16 
Ji 1921. [With portrait.] 
Child, C. M. Certain aspects of the problem of physiological correla- 
tion. Am. Jour. Bot. 8: 286-295. 30 Je 1921. 
Clark, S. P. Sweet clover in Arizona. Univ. Arizona Coll. Agr. 
Circ. 347 4-7: Ap i921. 
[Clute, W. N.] A new form of Dentaria. Am. Bot. 27: 69. My 1921. 
Dentaria laciniata var. dichronum from lowa. 
Collins, J. L. Inbreeding and crossbreeding. Jour. Hered. 12: 89-93. 
fc ZF-g4e 214 J teen. 
“The effect of inbreeding and crossbreeding in a wild plant [Crepis capillaris} 
of the sunflower family.” 
Conard, H. S. An outline for vascular plants. Science II. 54: 15, 16. 
1 Jl 1921. 
Cook, M. T., & Martin, W. H. Potato diseases in New Jersey. New 
Jersey Agr. Exp. Sta. Circ. 122: 1-39. f. 1-21. F 1921. 
Cook, M. T., & Poole, R. F. Diseases of sweet potatoes. New Jersey 
Agr. Exp. Sta. Circ. 123: 1 1-24. f. 1-17. Ap 1921. 
Douin, C. La famille de Cephaloziellacées. Soc. Bot. France Mem. 
29: 1-90. f. f-102. 26 D 1030. 
Includes as American novelties, the genus Evansia, and species in Prionolobus (1), 
Evansia (1), and Cephalozielia (9). 
East, E. M., & Jones, D. F. Round tip tobacco—a plant ‘‘ made to 
order.”’” Jour. Hered. 12:. 51-56. 61. 1 +f. 1-5. 11 Jl 1921. 
Felt, E. P. Key to American insect galls. New York State Mus. Bull. 
200: 1-310. pl. I-16 + f. 1-250. 1 Au 1917. 
Fernald, M. L. The geographic distribution of hybrids. Science II. 
54: 73, 74. 22 Ji 1921. : 
Folsom, D. Potato leafroll. Maine Agr. Exp. Sta. Bull. 297: 37-52. 
f. 26-35. Ap 1921. 
