HANDBOOK OF BRITISH HEPATICiE. 195 



In mountainous districts. 



Growing in loose patches, a few 

 inches broad, or scattered amongst 

 mosses. Stems I to 2 inches long, 

 erect, thread-like, flexuose, simple, 

 or innovant towards the apex. Leaves 

 close and subimbricate, widely ovate, 

 approaching cordate, spreading or 

 erect and secund, half embracing at 

 the base and decurrent, at the apex 

 with a rather deep obtuse notch 

 (fig. 139). Margins recurved. Colour 

 brownish green. 



GENUS 26. MYLIA, Gray. 



Involucre small-leaved, leaves connate at 

 the base. Perianth terminal, elongated, cylin- 

 drical, longer than the calyptra, mouth com- 

 pressed, two-lipped. Capsule four-valved, 

 coriaceous. Elaters double, naked, deciduous. 

 Gray Arr. /., 693 (1821). 



Dioicous. Perianth terminal, laterally compressed 

 from a subterete base, contracted at the apex, at 

 length bilabiate, denticulate ; involucral bracts two, 

 spreading from a clasping base. Leaves succubous, 

 bifariously imbricated, alternate, circular, or ovate, 

 and pointed. Amphigastria subulate. Elaters bi- 

 spiral, deciduous. 



Plants forming dense tufts in Alpine bogs, or 

 clinging to the stems of Sphagnum. The com- 

 pressed perianth of Plagiochila is combined with 

 general habit of Jungermannia. 



O 2 



