INDEX TO AMERICAN BOTANICAL LITERATURE 209 
Britton, N. L. William Harris. Jour. New York Bot. Gard. 22: 13, 
14. Ja 1921. 
Brotherton, W. The heredity of ‘‘rogue’’ types in garden peas ( Pisum 
sativum). Ann. Rep. Michigan Acad. Sci. 21: 263-279. pl. 7-13 + 
773s < JhiIGe. 
’ Brush, W. D. Utilization of black walnut. U.S. ‘Dept. Agr. Bull. 909: 
¥-89. pl..r-1g 4 f. 1-7. 17 Ja 1941. 
Burnham, S. H. Camptothecium nitens var. falcifolium Ren. Bryolo- 
gist 23: 92. 8 F 1921. 
Burnham, S. H. The mosses of the Lake George flora. Bryologist 
23: 38-45; 54-60. 1920. 
Catoni, L. A. El cultivo de la vainilla en Puerto Rico. Revista 
Agric. Puerto Rico. 5°: 11-23. 30 D 1920. 
Chiovenda, E. L’ Eragrostis caroliniana (Spreng.) Scribner. Boll. 
Soc. Bot. Italiana 1920: 11-16. 20. 
Chodat, R., & Vischer, W. La végétation du Paraguay. VIII-X. 
Pp. 291-379. f. 228-280. Geneva. 1920. 
Reprint, with altered pagination, from Bull. Soc. Bot. Genéve II. 11: 211-299. 
IQIQ. 
Clarke, J. M. The oldest of theforests. Sci. Mo.12: 83-91. Ja 1921. 
[Illust.] : 
Clarkson, E. H. The story of a fern garden—I. Am. Fern Jour. 10: 
Ra-57* S2-G7.° 1920. 
Clute, W. N. The power of movement in plants. Gard. Chron. 
Am. 25: 426. Ja 1921. 
Clute, W. N. Plant travelers. Gard. Chron. Am. 25: 467, 468. 
F roar. 
Conzatti, C. El estado de Oaxaca Ab sus recursos naturales. Pp. 1-83. 
Oaxaca, Mexico. 1920. 
Coons, G. H. The Michigan plant disease survey for 1918. Ann. 
Rep. Michigan Acad. Sci. 21: 331-343. pl. 15. Jl 1920. 
Darlington, H. T. Distribution of the Orchidaceae in Michigan. 
Ann. Rep. Michigan Acad. Sci. 21: 239-261. Jl 1920. [Illust.] | 
Contains keys to species and lists of specimens seen. 
Davis, A. R. The variability of plants grown in water cultures. © Soil 
Sci. 13: 1-32. Ja 1921. 
Davis, C. B. Revelations in hairs. Guide Nat. 13: 117-123. f. 1-7. 
Ja 1921. 
