44 HEPATICjE. 



Hexuose, when fertile regularly pinnate, when sterile sparingly 

 branched or almost simple. Leaves approximate, bifarious, 

 alternate, erecto-patent, unequally bilobed, antical lobe convex, 

 ovate or oval-acuminate, apex incurved, margin coarsely and 

 irregularly serrate, postical lobe about half the size of the antical, 

 oval, free margin involute, furnished with a large tooth near the 

 apex, below entire or slightly denticulate (1 or 2 minute teeth). 

 Cells smallish to small, 4-, 5- and 6-angled, walls firm, no thickened 

 angles or trigones. Sti^Dules obtriangular, bifid, sinus broadly 

 sublunulate, segments subulate or triangular, very divergent, 3, 

 rarely 2 cells wide at the base. Female inflorescence on short 

 branches ; bracts smaller than the leaves but somewhat similar, 

 only both the antical and postical lobes more serrate, the postical 

 not being involute. Perianth pyriform, brevi-rostrate, acutely 

 5 -angled, keels above setose-spinose- winged, mouth when open 

 with few teeth. Androecia terminal on long branches ; perigonial 

 bracts 3 to 4 pairs, erect or erecto-patent, closely imbricate, turgid 

 at the base, antical lobe serrate, postical almost equal in size ; 

 antheridia oval to globose, pale, stipe of equal length, arcuate- 

 curvate ; perigonial bracteoles similar to the stipules, only with 

 segments less divergent. 



Dimensions. — Stem \ inch long, '05 mm in diameter, with 

 leaves '3 mm. to *4 mm. wide ; leaves, antical lobe '325 mm. x 

 •175 mm., postical '2 mm. x '125 mm., antical '25 mm. x '1 mm., 

 postical '15 mm. x "OTo mm., antical "25 mm. x '125 mm., postical 

 "175 mm. x "1 mm. ; cells "02 mm., "02 mm., x *025 mm., "02 

 mm. X "03 mm.; stipules '1 mm. x "1 mm.; segments "05 mm., 

 •075 X "1 mm., seg. "05 mm. ; bract, antical lobe "275 mm. x '125 

 mm., postical '2 mm. x '1 mm.; perianth •G mm. x '4 mm., beak 

 •01 mm. long; perigonial bract, antical lobe '25 mm. x '15 mm., 

 postical '175 mm. x '125 mm. ; perigonial bracteole "1 mm. x '08 

 mm., seg. "05 mm. ; antheridia '08 mm. x '06 mm. 



Hab. — On shaded rocks, especially gold-bearing quartz, 

 rarely on trees. Rare. 



7. Cwm Bychan, Merionethshire, Rev. Mr. Saltoay. Tyn-y- 

 Groes, Merionethshire, W. H. P., G. A. Holt. 10. Dent, 

 Yorks, G. Stabler. Ingleton, Yorks, G. Webster and IF. H. P. 



