INDEX TO AMERICAN BOTANICAL LITERATURE 505 
Collins, F. S. Notes from the Woods Hole Laboratory—1917._ Rho- 
dora 20: 141-145. pl. 124. 1 Au 1918 
Includes Microchaete naushonensis, Bulbochaete F urberae, and Erythrotrichia rhi-~ 
zotdea, spp. nov. 
Coutant, M. W. Wound periderm in certain cacti. Bull. Torrey Club 
45: 353-364. pl. o+f. 1-3. 20S 1918. 
Cunningham, B. Cross-conjugation in Spirogyra Weberi. Bot. Gaz. 
OG. 274, 27%. f.-3. 16 8 1918: 
Davidson, A. Additions to the local flora. Bull. So. Calif. Acad. 
Sci. 17: 60, 61. Jl 1918. 
Davidson, A. Lupinus mollisifolius spec. nov. Bull. So. Calif. Acad. 
Soi. 29° 57. 4.10138. 
Davidson, A. Lupinus Paynei spec. nov. Bull. So. Calif. Acad. Sci. 
17: 58,59. Jli1918.  [Illust.] 
Detwiler, S. B. Battling the pine blister rust. Am. Forestry 24: 
451-457. Au s918. _ [Illust.] 
Dodge, B. O. Studies in the genus Gymnosporangium—lII. 
origin of the teleutospore. Mycologia 8: 182-193. pl. g-iz. Jl 
1918. 
Drechsler, C. The taxonomic position of the genus SER 
Proc. Nat. Acad. Sci. 4: 221-224. Au 1918. 
East, E. M. The home of the sovereign weed. Sci. Mo. 7: 170~178. 
Au 1918. 
Emig, W. H. Octodiceras Julianum Brid. var. ohioense, new variety. 
Bryologist 21: 60, 61. pl. 26. Jl 1918. 
Farr, C. H. Cell division by furrowing in Magnolia. 
5: 379-395- pl. 30-32. 3 Au 1918. 
Felt, E. P. Gall insects and their relations to plants. 
509-525. Je 1918. [I[llust.] 
Foxworthy, F. W. Philippine Dipterocarpaceae, II. 
13: (Bot.) 163-199. pl. r, 2. My 1918. 
Seventeen new species are described. 
Fred, E. B., & Davenport, A. Influence of reaction on nitrogen- 
assimilating bacteria. Jour. Agr. Research 14: 317-336. 19 Au 
1918. 
Frye, T. C. The age of Pterygophora californica. 
Biol. Sta. 2: 65-71. pl. 17. 1 Jl 1918. 
Frye, T. C. Illustrated key to the western Sphagnaceae. Bryologist 
21: 37-48. pl. 17-23. 30 Jl 1918. 
Am. Jour. Bot. 
Sci. Mo. 6: 
Philip. Jour. Sci. 
Publ. Puget Sound 
