INDEX TO AMERICAN BOTANICAL LITERATURE 383 
Darlington, H. T. Weed immigration into Michigan. Michigan Acad. 
Sci. Ann. Rep. 20: 261-267. 22 N 1918. 
Dodge, C. K. Contributions to the botany of Michigan—II. Univ. 
Mich. Mus. Zool. Misc. Publ. 5: 1-44. 13 Jl 1918. 
Evans, A. T. Embryo sac and embryo of Pentstemon secundiflorus. 
Bot. Gaz. 67: 427-437. pl. 12. 19 My 1919. 
Evans, A. W. A taxonomic study of Dumortiera. Bull. Torrey Club 
46: 167-182. 23 My 1919. 
Farwell, O. A. Necessary changes in botanical nomenclature. Rho- 
dora 21: 101-103. 21 My ro19. 
Farwell, O. A. Notes on the ae flora. Michigan Acad. Sci. 
Ann. Rep. 20: 161-195. 22 N1 
Many new varieties and bbls e are ae 
Farwell, O. A. The Trillium grandiflorum group. Michigan Acad. 
Sci. Ann. Rep. 20: 155-159. 22 N 1918. 
Farwell, O. A. The yellow flowered cypripediums. Michigan Acad. 
Sci. Ann. Rep. 20: 197, 198. 22 N 1918. 
Fernald, M.L. Bidens connata Muhl., var. gracilipes n. var. Rhodora 
21: 103, 104. 21 My 1919. 
Fernald, M. L. Rubus idaeus and some of its variations in North 
America. Rhodora 21: 89-98. 21 My 1 
Flynn, N. F. Plants new to Vermont collected at Woodstock. Ver- 
mont Bot. & Bird Club Bull. 4 &5:7. Ap 1grg. 
Flynn, N. F. A word concerning xanthiums. Vermont Bot. & Bird 
Club Bull. 4 & 5:20. Ap 1919. 
Fraser, W. P. Cultures of heteroecious rusts in 1918. Mycologia 
#22 129-134. 7 Je roto: 
Free, M. Effect of low temperatures on greenhouse plants. Brooklyn 
Bot. Gard. Rec. 8: 14-17. Ja 1919. 
Galloway, B. T. Giant crowngalls from the Florida everglades. 
Phytopathology 9: 207, 208. pl. ro. 23 My 1919. 
Gardner, M. W. The mode of dissemination of fungous and bacterial 
diseases of, plants. Michigan Acad. Sci. Ann. Rep. 20: 357-423. 
22 N 1918. 
Gates, F.C. A comparison of the trees found in cemeteries of Hancock 
County, Illinois, with the native trees of the same region. Michigan 
- Acad. Sci. Ann. Rep. 20: 245, 246. 22 N 1918. 
