INDEX TO AMERICAN BOTANICAL LITERATURE 351 
Murrill, W. A. [lustrations of fungi—XXVIII. Mycologia 10: 107- 
110. pl. 6. 
Pycnoporus cashed: Poronidulus conchifer, Polyporus Polyporus, Bjerkan- 
dera adusta, Tyromyces amorphus and Cerrena unicolor, are illustrated in color. 
Nichols, G. E. Additions to the list of bryophytes from Cape Breton. 
Bryologist 21: 28, 29.. 30 Ap 1918. 
Osner, G. A. Siemphylium leafspot of cucumbers. Jour. Agr. Re- 
search 13: 295-306. pl. 21+24 + f. I-3. 29 Ap 1918. 
Osterhout, G.E. A new Hymenopappus from Colorado. ‘Torreya 18: 
go. 4 Je 1918. 
Hymenopappus polycephalus sp. nov. 
Parr, R. The response of Pilobolus to light. Ann. Bot. 32: 177-205. 
f. 1-4. Ap 1918. 
pin se E. B. Notes on certain Cruciferae. Ann. Missouri Bot. 
ome -151. Ap 1918 
Includes alee Osterhoutii, Dithyrea membranacea and D, clinata spp. nov. 
Porto, P. C. Um caso de hybridacgdio natural. Arch. Jard. Bot. Rio 
de Janeiro 2: 65, 66. pl. 27. 1918. 
Pratt, O. A. Soil fungi in relation to diseases of the Irish potato in 
southern Idaho. Jour. Agr. Research 13: 73-100. pl. A., B. +f. 
I-q. 8 Ap 1918. 
Prince, S. F. Fern notes. Am. Fern Jour. 8: 4-8. Mr 1918. 
Rangel, E. Alguns fungos novas do Brasil. Arch. Jard. Bot. Rio de 
Janeiro 2: 69-71. pl. 28-30. 
New species are described in Puccinia (3), Septoria (1), Cercospora (1), and 
Helmintosporium (1). 
Ransier, H. E. More pleasures from old fields. Am. Fern Jour. 8: 
8-12. pl. r, 2. Mr 1918. 
Record, S. J. Intercellular canals in dicotyledonous woods. Jour. 
Forestry 16: 429-441. f. 1-8. Ap 1918. 
Roberts, J. W., & Pierce, L. Apple bitter rot and its control. U.S. 
Dept. Agr. Farm. Bull. 938: 1-14. f. 1-3. Ap 1918. 
Rock, J. F. New species of Hawaiian plants. Bull. Torrey Club 45: 
133-139. pl. 6. 1 My 1918. 
Includes new species in Cyanea (2), Lobelia (1), and Straussia (1). 
Sargent, C. S. Notes on North American trees—I. Quercus. Bot. 
Gaz. 65: 423-459. 15 My 1918. 
One new species and many new varieties and new hybrids are described. 
Seaver, F. J. The black locust tree and its insect enemies. Jour. 
Y. Bot. Gard. 19: 100-104. pl. 212. My 1918. 
