INDEX TO AMERICAN BOTANICAL LITERATURE © 487 
Pennell, F. W. Scrophulariaceae of the local flora—I. Torreya 19: 
107-119. 7 Au 1919;—II. Torreya 19: 143-152. 17 S 1919;—III. 
Torreya 19: 161-171. S$ 1919. 
Includes Veronica Brittonit Porter and V. glandifera Pennell, spp. nov., and 
several new varieties and combinations. 
Powell, O. Insect enemies and diseases of the tomato. U.S. Dept. 
Agr. Circ. 40: 1-18. f. 1-23. Je 1919. 
Reed, H. S. Certain relationships between the flowers and fruits of 
the lemon. Jour. Agr. Research 17: 153-165. f. rz. 15 Jl 1919. 
Reinking, O. A. Phytophthora faberi Maubl: the cause of coconut bud 
rot in the Philippines. Philip. Jour. Sci. 14: 131-151. pl. 1-3. 
Ja 1919. 
Rock, J. F. The arborescent indigenous legumes of Hawaii. Hawaii 
Agr. & Forest. Bot. Bull. 5: 1-53. pl. 1-18. 9 Je 1919. 
Rock, J. F. The Hawaiian genus Kokia a relative of the cotton, 
Hawaii Agr. & Forest. Bot. Bull. 6: 1-22. pl. 1-7. 9 Je 1919. 
Rose, J. N. Botanical explorations in Ecuador in 1918. Jour. N. Y. 
Bot. Gard. 20: 155-160. pl. 234, 235. Au 1919. 
Russell, G. A. Effect of removing the pulp from camphor seed on 
germination and the subsequent growth of the seedlings. Jour. 
Agr. Research 17: 223-238. pl. 20, 21 +f.1-5. 15 Au 1919. 
Sampson, A. W. Plant succession in relation to range management. 
U. S. Dept. Agr. Bull. 791: 1-76. pl. 1,2 +f. 1-26. 27 Au 1919. 
Sayre, J.D. Factors controlling variations in the rate of transpiration. 
Ohio Jour. Sci. 19: 491-509. f. 1-9. Je 1919. 
Schaffner, J. H. Unusual dichotomous branching in Vernonia. 
Ohio Jour. Sci. 19: 487-490. f. 1. Je 1919. 
Schneider, C. Notes on American willows—III. A conspectus of 
American species and varieties of sections Reticulatae, Herbaceae, 
Ovalifoliae, and Glaucae. Bot. Gaz. 57: 27-64. 18 Ja 1919. 
Shaw, T. Forage crops other than grasses. 1-287. f. I-29. New 
York. 1919. 
Shear, C. L., & Stevens, N. E. The mycological work of Moses 
Ashley Curtis. Mycologia 11: 181-201. 30 Au 1919. 
Shreve, E. B. A thermo-electrical method for the determination of 
leaf temperature. Plant World 22: 100-104. f. 1,2. Ap 1919. 
