INDEX TO AMERICAN BOTANICAL LITERATURE 67 
Carey, C. L. On the gross structure of an agar gel. Bull. 
Torrey Club 48: 173-182. f. 7-4. 1 Au 1921. 
Clements, F.E. Scope and significance of eae ecology. Bull. 
Geol. Soc. Amer. 29: 369-374. 30 Je 1918. 
Cobb, F., & Bartlett, H. H. On sushiee inheritance in 
crosses between mass- mutating and non-mass-mutating 
strains of Oenothera pratincola. Jour. Washington Acad. 
Sci. 9: 462-483. 4 O 1919. 
Collins, G. N. Intolerance of maize to self-fertilization. Jour. 
Washington Acad. Sci. 9: 309-312. 4 Je 1919. 
Collins, G.N. New place effect in maize. Jour. Agr. Research 
1Z:. 231-243. 4 FP 1gts: 
Collins, G. N. The origin of maize. Jour. Washington Acad. 
Sci. 2: 520-530. 19 D 1912. 
Collins, G. N., & Kempton J. K. A hybrid between Tripsacum 
and Euchlaena. Jour. Washington Acad. Sci. 4: 114-117. 
4 Mr 1914. 
Collins, G. N., & Kempton, J. H. A _ teosinte-maize hybrid. 
Jour. Agr. Research 19; 1-37. pl. 1-7 +f. 1-33. 1 Ap 1920. 
Cook, O. F. Agriculture and native vegetation in Peru. Jour. 
Washington Acad. Sci. 6: 284-293. f. z, 2. 19 My 1916. 
Cook, O. F. Evolution through normal diversity. Jour. Wash- 
ington Acad. Sci. 9: 192-197. 4 Ap 1919. 
Cook, O. F. Glaucothea, a new genus of palms from Lower 
California. Jour. Washington Acad. Sci. 5: 236-241. 4 
Ap 1915. 
Cook, O. F. Ivory palmsin Panama. Jour. Washington Acad. 
Sci. 3: 138-143. 4 Mr 1913. 
Includes 4 new species of Phytelephas. 
Cook, O. F. Jointed leaves of Amygdalaceae. Jour. Washing- 
ton Acad. Sci. 2: 218-220. 4 My I912 
Cook, O. F. The Mascarene cabbage palm as a new genus. 
. Jour. Washington Acad. Sci. 7: 121-127. 4 Mr 1917. 
Linoma Cook, gen. nov. 
Cook, O. F. Morphology and evolution of leaves.. Jour. 
Washington Acad. Sci. 6: 537-547- 19S 1916. 
Cook, O. F. A new omer name for the epee Jour. 
Washington Acad. Sci. 3: 158-160. 19 Mr 
Achradelphia Cook., nom. nov. 
