658 BRITTON: WEST INDIAN MOSSES 
Polytrichum laxifolium Besch. 1. c. 211. 
Polytrichum Pleeanum Besch. |. c. 212. 
Polytrichum Sintenisit C. Mill. Hedwigia 37: 222. 1898. 
Polytrichum (Catharinella) obscuro-viridis C. Mill. 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. Musc. Pl. 20. 
ExsIccaTAE: Sull. Musci Cub. Wright. 57; Husnot, Pl. 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. pl. rg. 1818. From 
original specimen of Swartz. E. & P. Nat. Pfl. 1°: 656. f. 498: 
1904. 
