May 1903] Index to North American Mycology 
149 
Rhizobia, Contributions to the biology of. II. The mobility of 
Rhizobium mutabile. Albert Schneider. Bot. Gaz. 35 156-8. 
Jan. 1903. 
Rhizobium mutabile [mobility of.Schneider]. Bot. Gaz. 35:56. 
Jan. 1903. 
Rhopalomyces cucurbitarum. B & Rav. syn. of Choanephora 
cucurbitarum q. v. 
Rhopalomyces elegans var. cucurbitarum March., syn. of Choa¬ 
nephora cucurbitarum, q. v. 
Ribes cynosbati L., host to Aecidium albiperidium (syn. of 
Puccinia albiperidia Arth. n. sp.) Jour. Mycol. 8:53. June 
1902. 
Robinia, host to Pyropolyporus robiniae Murrill n. sp. Bull. 
Torr. Bot. Club, 30:114. Feb. 1903. 
Roestelia flaviformis Atkinson, syn. of Gymno sporangium 
daviformis, q. v. 
Rot, Apple, A Destructive, following Scab. [Cephalothecium 
roseum Cda.] H. J. Eustace. N. Y. Agr. Exp. Sta. Bull. 
227:367-389. PI. I-VIII. Dec. 1902. 
Rot, Black, Effect on Turnips. [Pseudomonas campestris 
(Pammel) Smith.] Erwin F. Smith. U. S. Dept. Agr. 
Bureau PI. Industry. Bull. 29:1-20. PI. I-XIII. 17 Jan. 
1902. 
Rusts, Plant. Problems in the Study of. [Presidential Address. 
Botanical Society of America.] J. C. Arthur. Bull. Torr. 
Bot. Club, 30:1-18. Jan. 1903. 
Salix, branch, host to Heliotium marginatum Clements n. sp. 
ments n. sp. Bull. Torr. Bot. Club, 30:86. Feb. 1903. 
Salix chlorophylla, wood, host to Psilothecium incurvum Cle¬ 
ments n. sp. Bull. Torr. Bot. Club, 30:86. Feb. 1903. 
Salix, wood, host to Dermatea macrospora Clements n. sp. Bull. 
Torr. Bot. Club, 30:88. Feb. 1903. 
Salvia mexicana, host to Puccinia mitrata Syd. n. sp. Monogr. 
Uredin 11294. 15 Nov. 1902. 
Sand, wet, matrix for Macropodia urceolata Clements n. sp. 
Bull. Torr. Bot. Club, 30:91. Feb. 1903. 
Scab, sec Rot, Apple, A destructive. . . . 
Schaffner, John H. Laboratory Outlines for the Elementary 
study of Plant Structures and Functions from the Stand¬ 
point of Evolution. Four Phycomycetes showing various 
habitats. Jour. Appl. Micr. and Lab. Meth. 6:2185-2186. 
Feb. 1903. 
