152 



HANDBOOK OF BRITISH HEPATICE. 



moss. Stems procumbent, 4 to | inch long, flexuous, 



extremity with the bran- 

 ches erect, pale green. 

 Leaves more or less 

 close, in two opposite 

 rows, horizontal, plane or 

 slightly concave, round- 

 ish ovate, half embracing 

 at the base,and decurrent, 

 variable at the apex (fig. 

 io6,after Martius). Those 

 nearest the base acutely 

 divided one-fifth down 

 into two acute segments, 

 slightly divaricate. Those 

 in the middle obtusely emarginate, segments 

 obtuse. Those near the apex entire and rounded. 

 Sometimes all are nearly entire throughout. 

 Colour, pale green. Perichsetial leaves remark- 

 ably variable, in some they are entire, in others 

 bifid, and entire, whilst others have the third 

 pair obtusely emarginate, the second pair deeply 

 emarginate, with acute points, and the first pair, 

 varying with two or three acute ovate segments, 

 unequally toothed. Stipules adpressed, oblong, 

 bifid or trifid, segments divaricate, slightly toothed 

 (fig. 108). Calyx obtusely triangular, mouth ex- 

 panded and slit on one side. Elaters bispiral, 

 cells compact (fig. 107). 



Genus 22. CHILOSCYPHUS, Dumort. 



Involucre scale-like, many-leaved, every- 

 where imbricate; perianth erect, cup-shaped, 



