386 INDEX TO AMERICAN BOTANICAL LITERATURE 
Millspaugh, C. F., & Sherff, E. E. Revision of the North American 
species of Xanthium. Field Mus. Nat. Hist. Publ. Bot. 4: 9-49. 
pl. 7-13. Ap I9gI9g. 
Includes descriptions of 4 new species. 
Murrill, W. A. Illustrations of fungi—XXX. Mycologia 11: 101- 
103. pl. 6. 7 Je 1919. : 
Ganoderma Tsugae, G. sessile, Inonotus dryophilus and Tyromyces Spraguei are 
illustrated in color. 
Nelson, J. C. The gender of Rumex. Am. Bot. 25: 55, 56. My 
1919. 
Nelson, J. C. Species east and west. Am. Bot. 25: 70, 71. My 
I9I9Q. 
Newcombe, F. C. Behavior of plants in unventilated chambers. 
Michigan Acad. Sci. Ann. Rep. 20: 145, 146. 22 N 1918. 
Oflive,] E. W. Key to some of the principal families of flowering 
plants. Brooklyn Bot. Gard. Leaflets 7: [1-4] 21 My 1919. 
Osterhout, W. J. V. Antagonism between alkaloids and salts in rela- 
tion to permeability. Jour. Gen. Physiol. 1: 515-519. f. 1-3. 
20 My 1919 
Pengelly, M. Demonstration of methods for the study of stomatal 
action. Michigan Acad. Sci. Ann. Rep. 20: 154. 22 N 1918. 
Pennell, F. W. Notes on plants of the southern United States—V. 
Bull. Torrey Club 46: 183-187. 23 My igr19. 
Includes Acerates hirtella sp. nov. 
Pollock, J. B. Blue-green algae as agents in the deposition of marl in 
Michigan lakes. Michigan Acad. Sci. Ann. Rep. 20: 247-260. 
pl. 10, 17. 22 N 1918. 
Pollock, J. B. The longevity in the soil of the Sclerotinia causing the 
brown rot of stone oon Michigan Acad. Sci. Ann. Rep. 20: 
279, 280, 29 NY 
Seeley, D. A. The cS of the growing season in Michigan. Michi- 
gan Acad. Sci. Ann. Rep. 20: 223-232. f. 22-25. 22 N 1918. 
Shreve, F. The establishment of desert perennials. Jour. Ecology 
5: 210-216. 3 Ja 1918. 
Shufeldt, R. W. Phytophotography or the science of photographing 
flowers. Am. Forestry 25: 1069-1074. f. 1-8. My 1919. 
Soth, B. H. The arctic gentian. Am. Bot. 25: 41. My 1919. [Il- 
lust.] 
byes’ 
