140 



L. tliamnodes (Flot.) Hue. This species shows that the 

 eastern Asiatic distribution is in this case parallel with that of 

 eastern United States. L. thamnodes is not known from west of 

 the Mississippi and is now considered synonymous with Evernia 

 mesomorpha Nyl. from eastern Asia. 



Genus: Ramalina 



Ramalina fraxinea (L.) Ach. This species (typica) is unknown 

 from our area except on the Pacific coast, and we have small 

 argument to distinguish it from the common R. Mensiezii Tuck., — - 

 in fact unlabelled material from the coast of France is in many 

 cases impossible of separation (see Bryologist 17: 20-22. 1914). 



R. Duriaei (DeNot.) Bagl. This plant occurs only in southern 

 California and appears again on the southeastern Atlantic coast 

 of Europe. 



R. calicaris (L.) Fr. emend. (= scopulorum) . The only repre- 

 sentative of this species-group is the occurrence in Alaska of 

 'R. subfarinacea Nyl. 



Genus: Alectoria 



A. Fremontii Tuck. This species, known only from western 



North America, is no longer a unique representative of our area, 



as it is now well known from Scandinavia and even France. 



Thoreau Museu^i of Natural History, 

 Concord, Mass. 



A POSSIBLE HABIT MUTANT OF THE SUGAR MAPLE 

 (ACER SACCHARUM)* 



By a. F. Blakeslee 



In the summer of 191 1 while on a collecting trip near Bing- 

 ham ton, N. Y., the writer's attention was attracted to a single 

 tree in a distant row of sugar maples. Its strikingly regular 

 outline suggested either that it had become overgrown by a 

 vine or had been artificially trimmed to suit the whim of some 

 topiarian artist. A closer approach and inspection, however, 



* Contribution from the Department of Genetics, Connecticut Agricultural 

 College. 



