238 Rhodora [Dxcehbzk 



BRYOPHYTES OF THE MT. GREYLOCK REGION,— II. 

 A. Le Roy Andrews. 



The observations of another summer upon the bryophytes of 

 the Mt. Greylock region go far to swell its list and clear up some 

 of the obscurities concerning its less common species. More exten- 

 sive notes upon habit and habitat of these will perhaps not be unwel- 

 come, as bearing, in some slight degree, upon problems of distribution 

 and environment. The species differ, of course, with altitude, and 

 on lower slopes with direction of exposure. 



It is possible to distinguish, roughly, three vegetative belts : lower 

 altitudes, from base to perhaps 2200 feet, middle altitudes, from 

 2200 to 2800, and higher altitudes, from 2800 to 3500 feet, the 

 summit. For the areas that my collections cover, the mountain 

 slopes westwardly into New Ashford, west and northwest into Wil- 

 liamstown, north and northeast into North Adams. A large gorge 

 in Williamstown very near the New Ashford line is known as Goodell 

 Hollow. Farther north in Williamstown an immense, very deep, and 

 composite gorge is not unfittingly termed the Hopper. The config- 

 uration of this last feature becomes noticeable even near the summit 

 of the mountain, and, as might be expected, the species of northern 

 range are to be sought here. My exertions of the past summer were 

 largely confined to these gorges and the summit region. Results, as 

 will be seen, were most noticeable in the genera Amblystegium 

 and Hypnum, while the sphagna proved more diversified and inter- 

 esting than I had anticipated. 



The nomenclature used is again, as far as possible, that of the 

 Manuals. In Amblystegium the monograph of Prof. Cheney in 

 Botanical Gazette (XXIV, 236, ff.) has been consulted. Comparison 

 has also been made in many cases with the figures in Sullivant's 

 Icones, in Braithwaite's British Moss-flora, etc. The species follow : 



Musci. 



Amblystegium admit urn, (Hedw.) Aust. On rock in woods, lower 

 slopes of Hopper. The species, which is not uncommon in the 

 vicinity, has a distinct preference for limestone. 



Amblystegium chrysophyllum, (Brid.) De Not. {Hypnum chrysophyl- 



