KEGIONAL DISTRIBUTION OF MOSSES. 293 



anum of the North (800 to 1,200 feet altitude). On the still lower ridges 

 and terraces south of the Tennessee Valley are found the Southern 



Fabronia spp. Bruchia curviseta. 



Cryphaea sp. Funaria flavicans. 



Thelia asprella. Physcomitrium turbinatum langloisii. 



Thelia Itscurii. Clasmalodon parvulus. 



Bruchia sullivantii. Thuidium microphyllum. 



Bruchia nigricans. 



with the Northern 



Climacium americanum. Campylium chrysophyllum. 



Brachythecium laetum. Stereodon curvifolius. 



Campylium hispidulum. 



Of aquatic mosses, Fontinalis lescurii is common throughout the 

 mountain region from an elevation of 800 to 2,000 feet. The eastern 

 and most southern of the Appalachian ranges traversing the basin of 

 the Ooosa River where the obdurate sandstones and flinty cherts pre- 

 vail, the arid flanks covered with open pine forests, are as poor in 

 mosses as the rolling pine barrens of the Maritime pine belt. Consid- 

 ering the large area unfavorable to the vegetation of mosses, it is not 

 to be expected that the moss flora will be found as rich and luxuriant 

 as in most of the Middle and Northern Atlantic States. 



In the Louisianian area only the lower division of the Coast pine 

 belt has been closely searched for mosses. In the Coast plain, with its 

 ample rainfall, mosses become again more abundant. Many of the 

 declivities of the pine-clad hills and the depressions between them, of 

 the exposed swampy banks of the pine barren streams, and of the flats 

 bordering the swamps in the plain, are covered with peat mosses 

 (Sphagnum) of various kinds. The greater part of them are common 

 from the Gulf to the Canadian lakes. Such are: 



Sphagnum rufescens. Sphagnum medium. 



Sphagnum recurvum. Sphagnum imbricatum cristatum. 



while others are confined to the subtropical region, namely : 



Sphagnum macrophyllum. Sphagnum mobiliense. 



Sphagnum microcarpum. Sphagnum mohrianum. 



Sphagnum ludovicianum. 



In the open flat pine barrens of the Coast plain flourish during the 

 winter and the first days of spring the following, mostly Southern 

 types : 



Bruchia donnellii. Bruchia curviseta. 



Bruchia sullivantii. Astomum ludovicianum. 



Bruchia ravenelii. Fissidens donnellii. 



Bruchia drummondii. Fissidens rarenelii. 



Besides these the following of Northern distribution : 



Fissidens minutulns. Fissidens snbbasilaris. 



Fissidens tajcifolius. 



