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BOTANICAL CONTRIBUTIONS. 

 Mycological Studies. I. 



By F. S. Eari.e. 



1. Ascocorticium in North America. 



In 1881 * Ellis and Harkness described under the name o 

 Ascomyces anomalus a fungus with naked asci forming white 

 spots on fallen pine bark. In 1889 Saccardo f transferred 

 this species to the genus Exoascus. In 188 1, Brefeld % pub- 

 lished Ascocorticium albidum as a new genus and species. 



An examination of the material in the herbarium here 

 shows Ellis' and Brefeld's species to be identical. The 

 genus Ascocorticium is well founded as it is sufficiently distinct 

 from Exoascus to be considered the type of a different fam- 

 ily, but the earlier specific name will evidently have to be re- 

 tained. The name and synonomy of the species will, there- 

 fore, be as follows : 



Ascocorticium anomalum (Ell. & Hark.). 



Ascomyces anomalus Ell. & Hark. loc. tit. (1881). 

 Exoascus anomalus Sacc. loc. tit. (1889). 

 Ascocorticium albidum Brefeld. loc. tit. (1891). 

 Exsic. : Ellis N. A. Fungi, no. 561, Rehm, Ascomyceten, 

 no. 1102. 

 Icones : Brefeld, Untersuchungen, 9 : pi. 1 . Jigs. 3?-J<?- 



2. A Synopsis of the North American Species of Periconia. 



The genus Periconia of the Dematiaceae has had a rather 

 checkered history. Nearly all the species now referred to it 

 have at one time or another been called Sporocybe, while 

 many of the species formerly known by this name must now 

 be sought for under Sporocybe, Stac/iybotrys, Haplophrag- 

 mium or Graphium. Periconia was first described and 



* Bull. Torrcy Club, 8 : 26 



fSylloge Fungorum, 8 : 82. 



i Untersuchungen iiber Schiinrnelpilze, 9 : 145. 



