30 HEPATIC^. 



globose, on short lateral branches, proceeding from t?ie main 

 stem. Perigonial bracts 2, 3 pairs, larger than the stem leaves, 

 unequally bifid, turgid, antical lobe oval-orbicular, postical lobe 

 smaller, oval ; perigonial bracteole oblong-quadrate, bidentate. 

 Antheridia oval-orbicular. 



Dimensions, — Stems J to 1 inch long, with leaves 75 mm. 

 wide, diameter of stem "1 mm., leaves, antical lobe '5 mm. x '3 mm., 

 postical '175 mm. x "11 mm., antical lobe "375 mm x '3 mm., 

 postical •175 mm. x '125 mm., antical -3 mm. x -3 mm., antical 

 •4 mm. X "3 mm. ; cells '025 mm. x "0175 mm., '02 mm. x '02 mm., 

 •03 mm. X "03 mm., "035 mm. x '035 mm. ; stipules '275 mm. x 

 •215 mm.; segments "075 mm., '25 mm. x '2 mm., segments 

 •0175 mm. ; 3rd sub-bract, antical lobe ^275 mm. x ^175 mm., 

 postical lobe -175 mm. x ^05 mm., 2nd sub-bract, antical lobe 

 •35 mm. x 2 mm., postical ^3 mm. x '15 mm. ; bract, antical lobe 

 •375 mm. x '25 mm., postical ^35 mm. x ^15 mm. ; bracteole ^375 

 mm. X *3 mm. ; segments ^225 mm., ^35 mm. x '275 mm., seg. 

 •2 mm. ; perianth 1*5 mm. x "1 mm. ; perigonial bract, antical lobe 

 •6 mm. X -5 mm. ; postical •S mm. x ^3 mm. ; perigonial bracteole 

 •3 mm. x •I mm. ; antheridia ^15 mm. x ^125 mm. 



Hab. — On exposed or shaded rocks, more rarely on trees. 

 Eare. 1. Culval Carn, Penzance, W. Ciirnow. Cam near West 

 Trevallo, JF. Ctirnow. Coast near Grurnard's Head, Cornwall, 

 Curnow and Marquand. St. Mary's, Scilly, W. Curnow. 7. Bar- 

 mouth, Merionethshire, Dr. Carrinyton, G. A. Holt, C. J. Wild, 

 and W. H. P. Tyn-y-Groes, Merionethshire, G. A. Holt. 

 Snowdon, Carnarvon, Br. Carrwgion. Pass of Llanberis, Car- 

 narvon, W. H. P. 10. Near Sedbergh, Yorks, M. B. Slater. 

 12. Windermere, Westmorland, G. Stabler. Kentmere, West- 

 morland, G. Stabler. 15. Trossachs, Perthshire, Br. Carrington. 

 Peugh Rocks, Strachan, Aberdeenshire, /. Sim. 16. Invermoi- 

 dart, West Inverness, S. M. Macvicar. Killarney, Br. Taylor, 

 Dr. Carrinyton, and others. 



Pound on the Continent. 



Obs. — Eemarkable for its caducous leaves ; having a very 

 narrow base at insertion, they fall off when dry on pressure, 



