DISTRIBUTION OF MOSSES. 291 
belong strictly to Atlantic North America, not considering the stragglers 
of widest distribution which are also found on the western declivity of 
the Rocky Mountains. The number of genera occurring in Alabama 
endemic to this part of the North American continent is small; although 
it is diffienlt to state it with exactness on account of the different 
views held by authors in regard to their limitation. The following are 
exclusively Eastern North American: 
Drummondia. Clasmatodon. 
Thelia, Pylaisiella. 
Fully 60 per cent of the genera are represented in the warmer parts 
of the globe, chiefly in tropical America. Such are the following, which 
are of an almost exclusively tropical distribution: 
Leucobryum. Schlotheimia, Cryphaea. 
Syrrhopodon. Rhizogonium. Orthostichella, 
More or less numerously represented in tropical America are the 
following: 
Sphagnum. Ptychomitrium. Polytrichum. 
Dicranella, Funaria. Fabronia. 
Campylopus. Bryum. Entodon. 
Trematodon. Bartramia. Thuidium. 
Fissidens. Philonotis. Rhynehostegium. 
Trichostomum. Catharinea. Eurhynchium. 
Barbula. 
Among genera more feebly represented in the Tropics are: 
Mollia. Leskea. Plagiothecium. 
Dicranum. Hedwigia. Amblysteginum. 
Desmatodon. Brachytheciiim. Hypnum. 
Physcomitrium. 
The following species of the Alabama flora occur in tropical America, 
those with an asterisk being exclusively American: 
Sphagnum compactum. (West Indies. ) Funaria calvescens. (Cosmopolitan; West 
* Sphagnum portoricense. (West Indies.) Indies, Mexico, etc.) 
* Trematodon longicollis. (To Brazil.) * Polytrichum tenue. (Brazil.) 
* Dicranella debilis. (West Indies to Bra- Rhizogonium spiniforme. (West Indies 
zil.) ; and Mexico.) 
Leucobryum glaucum, (West Indies.) Thuidium delicatulum. (West Indies and 
* Leucobryum pumilum. (West Indies. ) Mexico.) 
* Fissidens polypodioides. West Indies.) Thuidium microphyllum. (West Indies 
* Trichostomum macrostegium. (Cuba.) and Mexico.) 
Funaria hygrometrica. (Cosmopolitan; * Raphidostegium microcarpum. (Brazil.) 
West Indies, Mexico, etc.) 
Exclusively of northern distribution extending to the Boreal zones 
are the following: 
Sphaerocephalus, Fontinalis. Camptothecium. 
Mnium. Dichelyma. Stereodon. 
Amphoridium, Climacitum, 
