- INDEX TO AMERICAN BOTANICAL LITERATURE 473 
Fernald, M. L. The specific identity of Bidens hyperborea and B. 
colpophila. Rhodora 20: 146-150. 1 Au 1918. 
Fernald, M. L., & Wiegand, K. M. Some new species and varieties 
of Poa from eastern North America. Rhodora 20: 122-127. 
a2. 4b 3 ; 
Includes Poa saltuensis and P. paludigena, spp. nov. _ 
Gardner, N. L. New Pacific coast marine Pepe Univ. Calif. 
hue Bot. 6: 429-454. pl. 36, 37. 16 Jl 1918 
Inc $ new species in Chlorogloea (1), Xenococcus (1), Dermocarpa (4), Hyella 
(3), ce port (4) 
Gladwin, F. E. A non-parasitic malady of the vine. New York Agr. 
Exp. Sta. Bull. 449: 99-110. pl. 1-3. Mr 1918. 
Goodspeed, T. H., & Davidson, P. Controlled pollination in Nico- 
tiana. Univ. Calif. Publ. Bot. 5: 429-434. 10 Au 1918. 
Harris, J. A. Further illustrations of the applicability of a coefficient 
measuring the correlation between a variable and the deviation of a 
dependent variable from its probable value. Genetics 3: 328-352. 
Jl 1918. 
Harter, L. L. A hitherto-unreported disease of okra. Jour. Agr. 
Research 14: 207-212. pl. 23 +f. 1-3. 29 Jl 1918. 
Harvey, L. H. Intra-microsporangial development of the tube in the 
microspore of Pinus sylvestris. Ann. Rep. Michigan Acad. Sci. 
19: 333-335. f. 16, 17- 1917. 
Harvey, L. H. Polyembryony in Quercus alba. Ann. Rep. Michigan 
Acad. Sci. 19: 329-331. 1917- 
Hibbard, R. P. Physiological balance in the soil solution. Ann. 
Rep. Michigan Acad. Sci. 19: 163-166. 1917. 
Hillman, F. H. The agricultural species of bent grasses. Part II. 
The seeds of redtop and other bent grasses. U. S. Dept. Agr. Bull. 
692: 15-26. f. 3-11. 23 Jl 1918. 
Howe, M.A. Algae. In Britton, N. L., Flora of Bermuda, 489-540. 
28 F 1918. 
pastas descriptions of Boodlea struveotdes, 
, Seirospora purpurea, Ceramium leptozonum, 
spp. nov., and new combinations, Zonaria zonalis, 
encia Corallopsis, and Ptilothamnion bipinnatum. 
- Jackson, H. S. The Uredinales of Oregon. Brooklyn Bot. Gard. 
Mem. t: 198-297. 6 Jl 1918 
described in catidopeetalh (1), Melampsora (x), Milesia (1), 
Dasya Collinsiana, Callithamnion 
and Nemastoma gelatinosum, 
Gracilaria mammillaris, Laur- 
ip 
New 
Puccinia @). and Uromyces (1). 
