170 HEPATIC^. 



bracteoles 3 mm. x 'ITS mm., '4 mm. x '15 mm., "325 mm. x 

 "1 mm. ; perianth 3' mm. x 1'4 mm., 2*75 mm. x 1*5 mm. ; 

 pistillidia '2 mm. x "05 mm. 



Hab. — On wet rocks on momitains. 7. Glyders, North Wales, 

 E. M. Holmes, 1876. 



Extremely rare. 



Obs. — Distmguished from CcjjJi. fait cats (iSTees) by its smaller 

 size, lurid colour, leaves more frequently trilobed, much smaller 

 cell structure, in being acrocarpous, perianth with mouth laciniate- 

 dentate. 



From small forms o^ Jiim/. injlata Huds., in having postical, 

 flagelliform branches, distinct polyphyllous involucres, constant 

 presence of bracteole, perianth being visibly (although very 

 obtusely) trigonous upwards and rather wide-mouthed. 



Description of Plate LXIV. — Fig. 1. Plants natural size. 

 2. Portion of stem, postical view x 24. 3-7. Leaves x 24. 

 8. Portion of leaf x 290. 9-13. Stipules x 85. 14. Bract x 24. 

 15-17. Bracteoles x 85. 18. Perianth x 16 (Glyders, E. M. 

 Holmes). 



Subgenus 2. OBONTOSCHISMA, Bum, 



OdontoscJdsma, Dum. Recueil, p. I'J (18oo) (genus). 

 Sphagncecetis, Nees in G.L.N. Syn. Hep. p. 148 (1S45). 

 Jungermania, Dicks, itc. 



Plants somewhat robust, green or lurid, sometimes rosy, rarely 

 whitish, spreading, in closely intricate la3^ers, or creeping upon 

 mosses, very often densely csespitose. Stems firm, subterete, 

 prostrate or repeatedly arcuate, with the flagelliferous branches 

 rooting; leafy branches few, similar to the stem. Cells of the 

 stem about 8 in diameter, cortical 20-22, about equal in size to 

 the inner ones and of the same colour, sometimes more opaque. 

 Leaves succubous, inserted at the base diagonally or almost 

 longitudinally, broadly ovate or suborbiculate rotundate or retuse, 

 rarely obcordate or emarginate-bidentate, more or less concave, 

 entire ; cells medium size or ver}^ small, equilateral, walls in some 



