229 



Phylloporus, Gymnopilus {Flammula) , and Heheloma. A sum- 

 mary of the North American species in these genera is given 

 below : 



Genera 



Old Species 

 Also in Europe 



Old Species jjg^ Species 



America Only 



Tapinia . . . . 

 Paxillus . . . 

 Crepidoliis . . 

 Tubaria . . . . 

 Galerula . . . 

 Naucoria . . . 

 Pluleolus . . . 

 Mycena . . . . 

 Phylloporus . 

 Gymnopilus . 

 Hebelonia . . 



7 

 4 

 8 



21 



4 



2 



13 

 i8 



46 

 14 

 33 



6.=; 



85 



30 



2l8 



77 



325 



Dr. P. A. Rydberg followed with some notes on the "Flora of 

 the Rocky Mountains." He first gave a brief review of the 

 botanical explorations in this area, beginning with the expedition 

 of Lewis and Clark,, more than a hundred years ago, and men- 

 tioning the more important publications on the flora of the region. 

 The speaker had been interested in this flora for about twenty- 

 five years and had spent nine summers in making collections and 

 field studies in the region indicated. About fifteen years ago he 

 planned the publication of a manual of the flora of the Rocky 

 Mountains and has since worked intermittently on the prepara- 

 tion of the manuscript. The work had now progressed so far 

 that about a half of the proposed book was in type, and proof- 

 sheets were exhibited. The manual will cover the flora of Col- 

 orado, Utah, Wyoming, Idaho, and Montana, and the western 

 portions of Nebraska, South and North Dakota, together with 

 the Canadian provinces of Saskatchewan and Alberta and a small 

 part of British Columbia. 



Under the title "Observations on Tree Girdling," Dr. Fred 

 J. Seaver directed attention to two interesting cases, the first a 

 tulip tree which had been girdled for apparently six or seven 

 years and was still alive, and the second two maple trees in the 

 grounds of the New York Botanical Garden, which had been 

 girdled by beavers during the summer of 191 5 and have just 



