226 HEPATIC^. 



above, approximate or distant below, horizontally inserted, un- 

 equally bilobed, antical lobe about half the size of the postical, 

 crossing the stem or nearly so, convex, subquadrate, longer than 

 broad or roundish, free angle subacute or rotundate, margin 

 denticulate, postical lobe broadly oval or orbicular, often 

 rotundate, reflexed, margin denticulate ; epidermis smooth, cells 

 rather minute to small, roundish-quadrate, walls firm, no trigones 

 or thickened angles. Bracts larger than the leaves, unequally 

 bilobed, antical lobe about half the size of the postical, oblong- 

 subquadrate, free angle obtuse or rotundate, margin denticulate, 

 postical lobe oval, rotundate, margin denticulate. Perianth pro- 

 jecting more than half beyond the bracts, campanulate, oblong- 

 obovate, with a narrow base, mouth wide, denticulate. 



Androecia terminal on separate stems ; perigonial bracts 4, 5 

 pairs, smaller than the leaves, closely imbricate, unequally bi- 

 lobed, antical lobe about half the size of the postical, very convex, 



oval or orbicular, margin denticulate, postical oval ; antheridia 

 orbicular, pedicel long. 



Fruits April, May, June. 



Dimensions. — Stems 1 to 2 inches long, diam. '25 mm., with 



leaves 3* mm. wide; leaves, antical lobe 1'25 mm. x "75 mm., 



postical 2' mm. x 1'5 mm., antical I'l mm. x '75 mm., postical 

 1*75 mm. X 1-1 mm. ; cells '02 mm. x "02 mm., '015 mm., '02 mm. 

 x '015 mm. ; teeth of leaves "02 mm. x '02 mm. at base ; bracts, 



antical lobe 1'25 mm. x 75 mm., postical 2* mm, x I'l mm. ; 



perianth 3'5 mm. x 1*75 mm., marginal teeth "03 mm. ; perigonial 



bracts, antical lobe "9 mm. x "6 mm., postical 1'25 mm. x "75 mm.; 



antheridia -2 mm. x "175 mm. 



Hab.— On wet rocks and stones by the side and in streams. 



Not uncommon ; usually in subalpine districts. 



1. Banks of the Tamar, Devon, IF. Ctinioiv. 7. Tyn-y-Groes, 



Merionethshire, G. A. Holt. Cader Idris, Merionethshire, Jo/ui 

 WUiehead, IF. H. P. 8. Castleton, G. A. Holt. Kinder Scout, 



Derbyshire, G. A. Holt. 9. Crowden, Cheshire, G. A. Holt. 



Lonsrridffe Fell, Lane, IFheldon. Hindburn, Lane, A. Wilmn. 



Clouojha and Udale, Lane, Wheldon. 10. Arncliffe Wood, Esk- 



I 



