238 HEPATIC^E. ^Jungermannia. 



bipartite, the lower ones minute, stipules subquadrate lacini- 

 ated, fruit axillary, calyces oblong cylindrical hairy, the 

 mouth open. 



Jungermannia tomentella. Hook. Brit. Jung. t. 36. Engl. Sot. t. 

 2242. 



HAB. Wet rocks, especially near cascades. 



* * Lower or smaller segments involute. 



66. J. Mackaii ; stem creeping irregularly branched, leaves un- 



equally two-lobed, superior lobes rounded, inferior ones 

 minute involute, stipules large roundish obcordate, fruit 

 lateral and terminal, calyces obcordate depressed triangular, 

 the mouth contracted elevated toothed. 



Jungermannia Mackaii. Hook. Brit. Jung. t. 53. Engl. Bot. t. 2573. 



HAB. Trunks of trees and rocks, especially on calcareous 

 soil, South of England and Ireland. 



67. J. serpyllifolia ; stem creeping irregularly pinnated, leaves 



unequally two-lobed, superior lobes rounded, inferior minute 

 involute, stipules rounded acutely bifid, fruit lateral, calyces 

 broadly obovate pentagonal, the mouth contracted elevated 

 somewhat toothed. 



Jungermannia serpyllifolia. Hook. Brit. Jung. t. 42. Engl. Bot. t. 

 2537. 



HAB. Trunks of trees in alpine districts. 



68. J. hamatifolia; stem creeping irregularly branched, leaves 



unequally two-lobed, the superior lobes ovate acuminate often 

 curved at the apex, the inferior ones involute, stipules ovate 

 acutely bifid, fruit lateral, calyces obovate pentagonal, the 

 mouth contracted elevated toothed. 



Jungermannia hamatifolia. Hook. Brit. Jung. t. 51. Engl. Bot. t. 

 2592. 



HAB. Trunks of trees, South and West of England, and 

 South of Ireland. 



69. J. minutissima; stem creeping irregularly branched, leaves 



unequally two-lobed, superior lobes hemispherical, inferior 

 ones minute almost obsolete, stipules ovato-rotundate bifid, 

 fruit lateral, calyces obovato-rotundate pentagonal, the mouth 

 contracted slightly toothed. 



