frequency of a peculiar character. The locaHty was a wooded 

 slope in the area bounded by Midland, Yonkers, Jerome, and 

 McLean Avenues. I have sent this note to Torreya in the 

 hope that some of the local botanists may care to make counts 

 of this species in other surrounding Sajiguinaria localities and 

 investigate the nature of this peculiar society. 



I am reminded, in this connection, of a similar aberrant society 

 of Trillium grandiflomm Salisb. near Williamsville, Erie Co., N. 

 Y. This grove contains an unusually large number of cases of 

 acaulescence, petiolate leaves, and sepalody of the petals. These 

 variations are all known in Trillium graiidiflorum, but they are 

 really common in this particular society. 

 Bartelsville, Oklahoma 



REVIEWS 



Thaxter's Contribution toward a flonograpli of the Laboulbeniaceae. Part II* 



Part II of Professor Thaxter's monograph of the Laboul- 

 beniaceae is a handsome work of 251 quarto pages and 44 plates 

 and is throughout, as it is almost superfluous to remark, of the 

 same high quality that characterized the first part of the mono- 

 graph, published about twelve years ago. The growth of our 

 knowledge of these small fungous parasites on insects and the 

 manner in which Professor Thaxter has made this special field 

 peculiarly his own is well illustrated by the fact that when he 

 began his studies of the Laboulbeniaceae eighteen or twenty 

 years ago the- group in the world as a whole was credited with 

 six described genera (four of them valid) represented by fifteen 

 -described species, of which only one was from North America. 

 The present contribution brings the number of described species 

 and varieties up to about five hundred, distributed in more than 

 fifty genera, and the author intimates that during the progress of 

 the work more than one hundred additional new species have 

 accumulated, which must await elaboration at some future time. 

 And this expansion is due in very slight measure to any change 



* Thaxter, R. Contribution toward a Monograph of the Laboulbeniaceae. Part 

 II. Memoirs of the American Academy of Arts and Sciences 13 : 219-469. //. 28- 

 yj. Je 1908. 



