658 Britton: West Indian mosses 



Polytrichum laxifolium Besch. 1. c. 211. 



Polytrichum Pleeanum Besch. 1. c. 212. 



Polytrichum. Sintenisii C. Mull. Hedwigia 37: 222. 1898. 



Polytrichum (Catharinella) ohscuro-viridis C. Mull. Hedwigia 37: 



223. 1898. 



Habitat and type locality: "On clay banks, high moun- 

 tains of southern Jamaica." 



Distribution: Cuba, Jamaica, Haiti, Porto Rico, Guadeloupe, 

 Martinique, Dominica, Grenada, and Barbados. 



Illustration: Hedw. Sp. Muse. pi. 20. 



Exsiccatae: Sull. Musci Cub. Wright. 57; Husnot, PI. Ant. 

 Fr. 153. 



This species varies greatly according to habitat, whether dry 

 or wet, sunny or shady. It usually grows on roadside banks of 

 the hard red clay, on the dry or southern sides of the West Indian 

 islands and under such conditions, does not attain the lax, long 

 leaves that are produced in shady moist valleys. Micro- 

 scopic sections of the leaves show the lamellae to be somewhat 

 variable but all of one generally uniform character, and though 

 the serrations of the margins are more or less variable, the teeth 

 being at times appressed and at others spreading, we find no 

 constant differences between them. The presence of teeth on 

 the back of the costa is just as true of P. tortile Sw. as of P. glauci- 

 num Besch. 



7. Breutelia tomentosa (Sw.) Sch. "In Hb." Paris, Index 



Bryol. 1: ed. 2. 173. 1904 



Mnium tomentosum Sw. Prod. 139. 1788. 

 Bryum tomentosum Sw. Fl. Ind. Occ. 3: 1837. 1806. 

 Bartramia macrocarpa Hampe, Linnaea 32: 141. 1863. 

 Bartramia macrotheca Hampe, Ann. Sci. Nat. V. 3: 373. 1866. 

 Breutelia macrotheca Jaeg. Adumb. 1: 556. 1873-74. 



Habitat and type locality: " On the edge of woods high 

 mountains of Jamaica." 



Distribution: Jamaica and Guadeloupe to South America; 

 also Mexico and Costa Rica. 



Illustrations: Hooker, Musci Exot. pi. 19. 1818. From 

 original specimen of Swartz. E. & P. Nat. Pfl. I 3 : 656. /. 498. 

 1904. 



