FONTINALIS. 223 



Daltonia.) Leaves adpressed when dry, but spreading 

 when moistened, concave, ovate, lanceolate, with entire re- 

 curved margins; nerve of the stem-leaves disappearing 

 below the point, but that of the perichsetiura reaching the 

 whole length; lid conico-acuminate ; calyptra mitriforni, 

 somewhat fringed at the margin. — E^ig. FL p. 72. Pilo- 

 trichum heteromalla, Miill. Sj/n. pt. %. p. 167. 



On trunks of trees in England and south of Ireland, 

 much rarer in Scotland. Tr. Spring. This is an elegant 

 Moss, fructifying freely, and covering with its matted 

 branches the stems of trees on which it grows. A variety 

 has been found near Limoges, in Prance, growing in a 

 stream. 



PONTINALIS, Linn. (Water Moss.) 



All the species are found in fountains or streams, so that 

 the name is an appropriate one. Mtiller, in his Synopsis, 

 reduces this genus to a section of Pilotrichum. 



Generic Character. — Seta lateral. Peristome double ; the 

 inner of sixteen cilia, connected by transverse bars, and forming 

 a reticulated cone (a beantiful object). Calyptra mitriform. 



1. PoNTiNALis' ANTIPYRETICA, Linn. {Greater Water 



