Index to American Mycological Literature 
61 
Hawkins, L. A. The utilization of certain pentoses and com- 
pounds of pentoses by Glomerella cingulata. Am. Jour. Bot. 
2:375-388. O 1915. 
Hedgcock, G. G. Parasitism of Comandra umbellata. Jour. 
Agr. Research 5: 133-135. 18 O 1915. 
Hesler, L. R. Apple cankers and their control. Cornell Agr. 
Exp. Sta. Circ. 28: 17-28. /. 1-16. My 1915. 
Howe, R. H. The genus Cetraria as represented in the United 
States and Canada. Torreya 15; 213-230. /. i-io. O 1915. 
Howe, R. H. The Usneas of the world, 1752-1914, with cita- 
tions, type localities, original descriptions, and keys. Part II. 
South America. Bryologist 18; 38-43. 15 Je 1915; 52-63. 
/. I. 21 S 1915. 
Humphrey, C. J., and Fleming, R. M. The toxicity to fungi of 
various oils and salts, particularly those used in wood preser- 
vation. U. S. Dept. Agr. Bull. 227: 1-38. pi. 1-4. 23 Au 1915. 
Johnston, J. R. La enfermedad del platano en Cuba. Cuba 
Estac. Exp. Agron. Circ. 47: 1-13. pi. 1-7. 1915. 
Keitt, G. W. Simple technique for isolating single-spore strains 
of certain types of fungi. Phytopathology 5 : 266-269. /. /. 
o 1915- 
Lloyd, C. G. Synopsis of the section Apus of the genus Poly- 
poms. 291-392. /. 631-706. Cincinnati. Je 1915. 
Ludwig, ’C. A. Notes on some North American rusts with caeoma- 
like sori. Phytopathology 5; 273-281. O 1915. 
Includes Caeonia dubium sp. nov. 
Meinecke, E. P. Spore measurements. Science II. 42 : 430, 431. 
24 S 1915. 
Melchers, L. E. A new alfalfa leaf-spot in America. Science 
11.42:536,537- 1501915- 
Murrill, W. A. The genus Clitocybe in North America. Myco- 
logia 7: 256-283. pi. 164-166. S 1915. 
Includes descriptions of three new species. 
