Nov. 1906] Index to North American Mycology 
261 
Olive, Edgar W. Cytological Studies in Entomophthoraceae. 
II,Nuclear and Cell Division of Empusa. B'ot. Gaz. 411229- 
260. PI. XVI. Apr. 1906. 
Olive, Edgar W. The Morphology and Development of Em¬ 
pusa. Bot. Gaz. 41:192-206. PL XIV-XV. Mar. 1906. 
Ophiobolus sceliscophorus Fairman n. sp., on leaves of Phlox 
drummondii. Proc. Rochester Acad. Sci. 4:215. March 
1906. 
Orton, W. A. Plant Diseases in 1905. Yearbook U. S. Dept. 
Agr. 1905:602-611. 1906. 
Ostrya virginica, host to Teichospora praeclara Rehm n. sp.. 
Ann. Mycolog. 4:33d. Aug. 1906. • * 
Othiella fairmani Sacc. n. sp., ad cortices dejectos in silvis. 
Jour. Mycol. 12:48. Mar. 1906. 
Outline for the observation of some of the more common Fungi. 
George F. Atkinson. Plant World, 8:215-222, 245-255. 
Sept, and October 1905. 
Panaeolus retirugis the Rate of Growth of. Gertrude E. Doug¬ 
las. Torreya, 6:157-165. Aug. 1905. 
Paraphyses in the Genus Glomerella. John L. Sheldon. Sci¬ 
ence, N. S., 23:851-2. 1 June 1906. 
Parasitism of Neocosmospora [weak parasite on Ginseng]. How¬ 
ard S. Reed. Science, N. S. 23:751-2. 11 May 1906. 
Patellaria atrata f. indigotica (C. et P.) Rehm (Patellaria 
indigotica C et. P.; Lecanidion indigoticum Sacc. Syll.) 
Ann. Mycolog. 4:337. Aug. 1906. 
Patellaria indigotica C. et P., syn. of Patellaria atrata f. in¬ 
digotica q. v. 
Pear Scab [Fusicladium pirinum Lib.]. Ralph E. Smith. Calif. 
Agr. Exp. Sta. Bull. 163:1-18. Dec. 1904 [issued 1905.] 
Peck, Charles Horton. New species of Fungi. Bull. Torr. Bot. 
Club, 33:213-221 Apr. 1906. 
Peridermium, Analytical Key to Species [Arthur and Kern]. 
Bull. Torr. Bot. Club, 33 :4o8-4io. Aug. 1906. 
Peridermium, Host Key. [Arthur & Kern.] Bull. Torr. Bot. 
Club, 33:410-412. Aug. 1906. 
Peridermium, Key to the Assignment of Species of. [Arthur & 
Kern]. Bull. Torr. Bot. Club, 33:407. Aug. 1906. 
Peridermium boreale Arth. & Kern n. sp., on Picea parryana 
(Andre) Parry, (P. pungens Englm.), Picea engelmanni 
(Parry) Englm. Bull. Tor. Bot. Club, 33:425. Aug. 1906. 
