Fungi. — Lichenes, 423 



trees in the West Indies. He proved by niaking infections that the 

 fungus is parasitic on sugar cane and the cacao trees, and furthermore 

 that the sugar cane fungus produces the cacao disease and vice 

 versa. The identity of the two fungi is therefore established, and further- 

 more „that the fungus has not yet adapted itself to its host closely enough 

 to give rise to two physiological species." A discussion on Prophylaxis, 

 and the systematic position of the fungus is added. The figures on the 

 plate show the structure of the pycnidia and germinating spores. 



von Schrenk (St. Louis). 



Arthur, T. C, Clues to Relationship of Heteroecious 



Plant Riists. (Botanical Gazette. XXXIII. 1902. p. 61.) 



An address read before the Botanical Society of America in which 

 the Speaker points out how by close field Observation the plants which 

 bear related rust-forms may be discovered. 



von Schrenk (St. Louis). 



SalMON, E. S., Supplementary Notes on Eryslphaceae. 

 (Bulletin Torrey Botanical Club. XXIX. 1902. p. 1.) 



The writer has brought together a number of detailed notes on 

 various recent publications dealing with the Erysipheae. Among others 

 he discusses various new species, Smith's work on haustoria, the 

 phenomenon of spontaneous freeing of the perithecium, the possibility of 

 the occurence of „biological species" in the Eryslphaceae. The list is 

 to be continued. von Schrenk (St. Louis). 



Anderson, A. P. , Tilletia horrida on Rice Plant in 



South Carolina. (Bulletin Torrey Botanical Club. XXIX. 



1902. p. 35.) 



The writer states that the supposed Tilletia rotiindata (Arth.) Ell. 

 et Ev., recently described by him on rice from South Carolina is in reality 

 Tilletia horrida Tak., imported from Japan with rice seed. 



von Schrenk (St. Louis). 



Anderson, A. P., Dasyscypha reslnarla causing Canker 



Growth on Abies balsamea in Minnesota. (Bulletin 



Torrey Botanical Club. XXIX. 1902. PI. 1 and 2. p. 23.) 



The formation of a canker of Abies balsamea by Dasyscypha 

 resinaria (Cook et Thil.) Rehm is described. The discussion of the 

 systematic position of the fungus is followed by a detailed account of 

 the structure of the canker, with particular reference to abnormal resin 

 canals. The probable parasitism of the fungus is briefly treated. 2 plates 

 are added. von Schrenk (St. Louis), 



Steiner, J., Ueber die Function und den systema- 

 tischen Werth der Py cnocon idie n der Flechten. 

 (Separat-Abdruck aus ,,Festschrift zur Feier des zweihundert- 

 jährigen Bestandes des K. K. Staatsgymnasiums im VIII. Be- 

 zirke Wiens". 8". p. 38.) E. Kainz und R. Liebhart. Wien 

 1901. 



Die Pycnoconidien (Spermatien) der Flechten geben nach 

 zwei Richtungen Anlass zu einer tiefgehenden Differenz bei den 

 neueren Autoren; es herrscht ein fundamentaler Gegensatz in 

 der Anschauung über die Function und über den Werth dieser 

 Organe für die Systematik. 



