Notes and Brief Articles 



233 



Mycologia. New species described by Dearness and House are: 

 Diaporthe menispermi, Diaporthe triostei, Didymclla agrostidis, 

 Gloeosporium acutiloba, Gnomoniopsis acerophila, Leptosphaeria 

 collinsoniae, Leptothyrium conspicuum, Phomopsis impatientis, 

 Ramularia eamesii, Saccardinula alni, Septoria accto sella, Scptoria 

 hieracicola, Stagonospora meliloti, and Venturia fimbriata. 



Volume 6, part I, of North American Flora consists of a mono- 

 graph of the genus Phyilosticta by Fred J. Seaver. The work is 

 largely a compilation of the species described and reported for 

 North America — i.e., no attempt has been made to culture out the 

 species in order to determine their life histories, although the 

 gross morphology has been studied as carefully as the available 

 material will permit. Wherever the perfect stage is known, it has 

 been indicated in a note supplementary to the descriptions. In 

 order to comply with the form, a .key has been arranged. On 

 account of the difficulty, however, of constructing a satisfactory 

 key for such a large genus in which the specific differences are so 

 slight, the general rule for North American Flora has been modi- 

 fied and a host index supplied for the genus. An attempt has been 

 made to correct host determinations where material is adequate, 

 but unfortunately many of the specimens are so fragmentary that 

 it has been necessary to accept the host determinations made by 

 the collector. The entire work consists of 84 pages of text and 

 was issued early in April, 1922. 



Macbride's North American Slime-Moulds 1 



Both student and nature lover will welcome the appearance of 

 Professor Macbride's long-looked-for revision of the North Amer- 

 ican Slime-Moulds, for in spite of its obscurity this group of 

 organisms is of like interest to both the professional botanist and 

 the amateur. Standing as they do on the border line between 

 animals and plants, or, as suggested by the author of the book, 

 perhaps outside the pale of either, they furnish a most fertile field 

 for the speculation of the student. Consisting, as they do in their 



1 Macbride, T. H. North American Slime-Moulds, pp. i-xvii, 1-299. The 

 MacMillan Co., New York, 1922. 



