1906] Cherrington, — A Botanical Exhibition 135 



Hampshire in 1S47 bv WilHam Oakes (Hovey's Magazine, 13: 174). 

 Dr. A. J. Grout writes me that the only .sj)ecimens of thi.s species 

 which he has were collected in Vermont, so the New Hampshire 

 locality mentioned in Rhodora (1:53) is undoubtedly an error. 

 The Vermont jilants were collected on both Willoughby Mt., and on 

 INlt. Mansfield by Dr. G. G. Kennedy. 



Polifirichum Jensenii is a j)lant which is known from Lapland, 

 Finland, Spitzbergen, Greenland, Alaska, and the Yellowstone Park. 

 The JNIaine plant which is here referred to this species grew amongst 

 sphagnum in a bog at Pres([ue Isle. It differs mainly from authentic 

 material, kindly loaned by Mr. J. M. Holzinger, in having longer and 

 somewhat flexuose stems, less rigid leaves, and thinner-walled marginal 

 cells of lamellae. 



BrOWX U-VIVERSITY. 



Botanical Exhibitiox at the Meeting of the Natural 

 History Societies of New England. — At the recent meeting to 

 form a Federation of the Natural History Societies of New England, 

 held at the rooms of the Boston Society of Natural History, there was 

 an exhibition which visiting botanists found of .some interest. The 

 Appalachian Mountain Club showed a small collection of j)lants 

 from above the tree line on ■Mt. Washington. These were mounted 

 under sheets of trans]>arent celluloid in such a way that they 

 could be conveniently handled and examined without danger to the 

 specimens, thus ol)viating a risk to which herbarium sheets, exposed 

 to public view, are usually lial)le. Miss Gora (.'larke of the Science 

 Club showed a niunber of sheets of mosses, some of which were 

 arranged as records of jiarticular days of collecting. Professor R. 

 H. Richards of the same clul) showed some .strikingly instructive 

 photographs of trees and shrubs, which exhil)ited successive stages 

 in the development of flowers and leaves and fruit. In particular, 

 two series, one of the Wych Elm and the other of the American Elm, 

 each consisting of ten views of twigs taken at weekly intervals, were 

 of special value as botanical .studies. Harry A. Cash exhibited the 

 Ricker mounts for plants. Miss Ella L. Horr, for the Worcester 

 Natural History Society, had a collection of Ferns, Club Mos.ses, and 

 INIosses, mosth' from Worcester County. The Botany Class of the 



