300 HISTORY OF BRITISH MOSSES. 



Trees and rocks in subalpine districts. Tr. Spring. 

 "^^^ Lower or smaller segments of leaves saccate. 



16. JuNGERMANNiA DiLATATA, Linn. {Dilated Junger- 

 mannia.) Stem creeping, irregularly branched ; leaves un- 

 equally two-lobed; the upper lobes roundish, acute; the 

 lower ones roundish, saccate; stipules roundish, plane, 

 emarginate; fruit terminal; perianth obcordate, tubercu- 

 lated, triangular. — Eng.Fl.p. 125; lloolc. Br. Jung.jil. 5. 



Trunks of trees, common. Pr. TV inter and Spring. So 

 common as to give a character to the scenery by the nume- 

 rous brown patches it forms on trees of all kinds. /. Ta- 

 marisci, the next species, resembles it much. It however 

 affects subalpine districts, and has longer and more regu- 

 larly pinnate stems. 



II. rilONDOSE. 



a. Fronds destitute of nerve. 



17. JuNGERMANNiA MULTIFIDA, Linn. {Many-lohed 

 Jungermannia.) Prond linear, nerveless, fleshy, compressed, 

 bi-pinnatifidly branched; fruit marginal; perianth very 

 short, the mouth dilated, fimbriated; calyptra exserted, 

 oblongo-cyliiidrical, tuberculated. — Eng. Fl. p. 126. 



On damp heaths, sides of ditches, etc. Pr. Spring. 

 "VYell marked by its deep-green multifid segments. 



