458 INDEX TO AMERICAN BOTANICAL LITERATURE 
Loeb, J. The physiological basis of morphological polarity in regenera- 
tion—II. Jour. Gen. Physiol. 1: 687-715. f. I-23. 20 Jl 1919. 
Love, H. H., & Craig, W. T. Fertile wheat-rye hybrids. Jour. 
Heredity 10: 195-207. f. 1-17. 15 Jl 1919. 
Lowe, R. L. Collecting in Oklahoma. Bryologist 22: 21, 22. Jl 
1919. 
McDougall, W. B. Some _ interesting hous of Champaign 
County. Trans. Illinois Acad. Sci. 9: 125-128. f. 1-7. 1916. 
Mehlhop, M. A Florida smut, Ustilago sieglingiae, in Illinois. Trans. 
Illinois Acad. Sci. 8: 140-142. 1915. 
Meyer, R. Die Bestachelung des Echinocactus Corniger P. DC. 
Monats. Kakteenk. 26: 46,47. Mr 1916. 
Miller, H. G. Relation of sulphates to plant growth and soma poeiiole 
Jour. Agr. Research 17: 87-102. pl. g-12. 16 Je 1919. 
M’Nutt, W., & Fuller, G. D. The range of evaporation and soil 
moisture in the oak-hickory forest association of Illinois. Trans. 
Illinois Acad. Sci. 5: 127-137. 1912. 
Moore, G. T. The Missouri Botanical Garden. Jour. Internat. 
Gard. Club 3: 281-291. Je 1g1g. _ [Illust.] 
Mosher, E. The grass flora of Illinois. Trans. Illinois Acad. Sci. 
8: 137-139. I915. 
Orton, C. R., & McKinney, W.H. Notes on some tomato diseases. 
Ann. Rep. Pennsylvania Agr. Exp. Sta. 1915-1916: [1-9]. 1917. 
Osterhout, W. J. V. Apparatus for the study of photosynthesis and 
respiration. Bot. Gaz. 68: 60-62. f. rz. 18 Jl 1919. 
Overholts, L. O. The species of Poria described by Peck. N. Y.- 
State Mus. Bull. 205, 206: 67-120. pl. 1-23. 1919. 
Pepoon, H. S. The cliff flora of Jo Daviess County. Trans. Illinois 
Acad. Sci. 2: 32-37. 1909. 
Pepoon, H. S. Peculiar examples of plant distribution a problem in 
phyto-geography. Trans. Illinois Acad. Sci. 8: 136. 1915. 
Pepoon, H. S. Peculiar plant distribution. Trans. Illinois Acad. 
Sci. 9: 128-136. 1916. 
Abstract. 
Pretz, H. W. Discovery of Trisetum spicatum in Pennsylvania. 
Rhodora 21: 128-132. 19 Jl 1919. . 
Pritchard, F. J., & Clark, W. B. Effect of spraying on early ripening 
of tomato fruit. Phytopathology 9: 289-291. Jl 1919. 
