June 1902] Index to North Americon Mycology 
89 
Rhizoctonia, A Second Preliminary Report on Plant Diseases 
in the United States, due to. Benjamin M. Dugger, and 
F. C. Stewart. Abstract. Science, N. S., 13:249. 15 Feb. 
1901. 
Rhizoctonia, the sterile fungus as a cause of Plant Diseases. 
B. M. Duggar and F. C. Stewart. Bull. Cornell. Univ. Agr. 
Exp. Sta., 186:51-76, and same with summary prefixed in 
Bull. N. Y. Agr. Exp. Sta. (Geneva), 186:3-30. Jan. 1901. 
Rhizoctonia and the Potato. F. M. Rolfs. Science, N. S., 
14:899. 6 Dec. 1901. 
Rhizomorphic Root-rot of Fruit Trees. E. Mead Wilcox. 
Oklahoma Agr. Exp. Sta. Bull., 49:1-32. 11 pi. Feb. 1901. 
(The same as a popular edition Bull., 49, also a summary 
in 10th An. Rep., same Station, p. 40-4. See Wilcox, E. 
Mead, A Rhizomorphic Root-rot.) 
Rhizomorphic Root-rot—Correction. E. M. Wilcox. Bot. 
Gaz., 32:226. Sept. 1901. 
Rhus, decorticated twigs, host to Tryblidium occidentale Earle 
n. sp. PI. Bakerianae, 2:10. 25 March 1901. 
Rhus trilobata, decorticated branches, host to Lachnella rhoina 
Earle n. sp. PI. Bakerianae, 2:7. 25 March 1901. 
Rhus trilobata, decorticated wood, host to Strickleria rhoina 
Earle n. sp. PI. Bakerianae, 2:16. 25 March 1901. 
Rhynchostoma pyriforme A. L. Smith sp. n., on rotten wood. 
Jour. Linn. Soc., 35:16. 1 April 1901. 
Ruellia sp. indet., host to Aecidium tracyanum Syd. nov. spec. 
Beiblatt zur Hedwigia, 40: (129). Sept.-Oct. 1901. 
Ribes, host to Otthia (Otthiella) ribis Tracy & Earle n. sp. PI. 
Bakerianae, 1:30. 22 Feb. 1901. 
Ribes, decorticated wood, host to Gibberidia ribis Tracy & Earle 
n. sp. PI. Bakerianae, 1:28. 22 Feb. 1901. 
Riley, William A. Rosellinia ovalis (Ell.) Sacc. Torreya 
1:22-23. Feb. 1901. 
Robinia pseudacacia L., Black Locust, a disease of. (Poly- 
porus, Fomes, rimosus Berk). Hermann von Schrenk. Mo. 
Bot. Gar. An. Rep. 12:21-31. PI. 3. 1901. 
Roestelia finfbriata Arthur sp. nov., on Sorbus sp. indet. Bull. 
Torr. Bot. Club, 28:666. Dec. 1901. 
Roestelia nelsoni Arthur sp. nov., on Amelanchier alnifolia Nutt. 
Bull. Torr. Bot. Club, 28:665. Dec. 1901. 
