Feb. 1903] Index to North American Mycology 
49 
Rhizoctonia [as Tree-destroying, Atkinson]. Trans. Mass. 
Hort. Soc. 1901 :i29-i30. 1902. 
Rhizoctonia, A Disease of Potato Stems in Ohio, due to. 
[Abstract.] A. D. Selby. Science, N. S. 16:138. 25 July 
1902. 
Rhizoctonia solani Kuhn (Potato Failures). F. M. Rolfs. 
Colo. Agr. Exp. Sta. Bull. 70:1-20. 12 pi. March 1902. 
Rhizobium mutabile in Artificial Culture Media. Albert 
Schneider. Bot. Gaz. 34:109-113. ipl. Aug. 1902. 
Rhododendron maximum, decaying leaves, host to Eomycenella 
echinocephala Atkinson n. sp. Bot. Gaz. 34:37. July 1902. 
Rhus copallina, host to Stemphylium copallinum E. & E. n. sp. 
Jour. Mycol. 8:73. June 1902. 
Rhus integrifolia, bark, matrix for Platygrapha plurilocularis 
A. Zahlbr. n. sp. Beihefte z. Bot. Centralbl. 13:157. 1902. 
Rhus laurina, bark, matrix for Arthonia rhoidis A. Zahlbr. n. 
sp. Beihefte z. Bot. Centralbl. 13:156. 1902. 
Rhus radicans, host to Zythia rhoina E. & E. n. sp. Jour. Mycol. 
8:13. May 1902. 
Rhus toxicodendron, host to Dothiorella radicans E. & E. n. sp. 
Jour. Mycol. 8:11. May 1902. 
Rhynchospora sp., host to Cintractia utriculicola (Henn.) Clint, 
n. sp. Jour. Mycol. 8:144. Oct. 1902. 
Rhytisma, A New Species of. W. A. Kellerman. Jour. Mycol. 
8:50. June 1902. 
Rhytisma concavum Ell. & Kellerm. n. sp. Jour. Mycol. 8:51. 
June 1902. 
Ribes cynosbati L., host to Aecidium albiperidium of Puccinia 
albiperidia Arthur n. sp. Jour. Mycol. 8:53. June 1902. 
Richardsonia scabra, host to Cercospora richardsoniae E. & E. 
n. sp. Jour. Mycol. 8 72. June 1902. 
Richardsonia scabra, host to Phyllosticta richardsoniae E. & E. 
n. sp. Jour. Mycol. 8 :62. June 1902. 
Ricker, P. L. Notes on some West American Fungi. [29 
species, 1 new.] Jour. Mycol. 8:125-8. Oct. 1902. 
Ricker, Percy Le Roy. A Preliminary List of Maine Fungi. 
The University of Maine Studies, No. 3, pp. 1-87. April 
1902. 
Ricinus communis, host to Cercospora canescens E. & M. Jour* 
Mycol. 8:73. June 1902. 
