316 INDEX TO AMERICAN BOTANICAL LITERATURE 
Davidson, J., & Le Clerc, J. A. Effect of various inorganic 
nitrogen compounds, applied at different stages of growth, 
on the yield, composition, and quality of wheat. Jour. 
Agr. Research 23: 55-68. 13 Ja 1923.: 
Deletang, L. F. Diatomeas subfosiles de Quilino (Cérdoba 
[Argentina]) e importancia de las investigaciones micro- 
paleontolégicas. Physis 6: 22-29. 30N 1922. 
Demerec, M. Inheritance of white seedlings in maize. Gen- 
etics 8: 561-593. N 1923. 
Dietel, P. Ein neues Coleosporium aus Mexico. Ann. Mycol. 
21: 340, 341. 1923. 
Coleosporium Reichei sp. nov. 
Dodge, B. O. The distribution of the orange rusts-of Rubus. 
Phytopathology 13: 61-74. 27 F 1923. 
Duggar, B. M.,& Armstrong, J. K. Indications respecting the 
nature of the infective particles in the mosaic disease of 
tobacco. Ann. Missouri Bot. Gard. 10: 191-212. S 1923. 
Durrell, L. W. The nodal infection of corn by Diplodia Zeae. 
Proc. lowa Acad. Sci. 29: 346, 347. 1922. 
Edson, H. A., & Shapovalov, M. Parasitism of Sclerotium Rolfsii 
on Irish potatoes. Jour. Agr. Research 23: 41-46. pl. 1-3. 
6 Ja 1923. 
Ellsworth, W.. Parry’s catalog of Iowa plants of 1848. Proc. 
Iowa Acad. Sci. 29: 339-344. 1922. 
Elmer, O. H. Studies of insect transmission and cross-inocula- 
tion of mosaic on the Solanaceae, Cucurbitaceae and 
Leguminosae. Proc. Iowa Acad. Sci. 29: 311, 312. 1922. 
Elmore, C. J. The diatoms (Bacillarioideae) of Nebraska. 
Nebraska Univ. Stud. 21: 22-170. pl. 1-22. O 1921. 
Emerson, R.A. The inheritance of blotch leaf in maize. Cor- 
nell Univ. Agr. Exp. Sta. Mem. 70: I-16. pl. 1-3. Je 1923- 
Farwell, O. A. Notes on the Michigan flora. Pap. Michigan 
Acad. Sci., Arts & Lett. 1: 85-100. F 1923. 
Includes Gentiana Billingtonii sp. nov. 
