438 HEPATIC^. 



Wihouiana), (Hayle, Curnow). 10. Pistillidium x 64 (Lough 

 Bray, McArclle). 11. Spore x 290 (var. Wihoniana), (Hayle, 

 Curnow). 12-14. Perigonial bracts x 24 (ditto), (Soiithport, 

 Wild). 



3. Pallavicinia Blyttii [Moerck), Lindh. 



Jangermania Bhjttil, Moerck Fl. Dan. x. 34, t. 2004 (1830). 



Gymnomitrion Blyttii, Hiiben. Hep. Germ. p. 44 (1834). 



Gordea Blyttii, Corda in Sturm Deutschl. Fl. (1835). 



J)i2domitrium Blyttii, Coixla in Sturm Fl. Germ. 11, p. 126 (1835). 



JHjjlolaena Blyttii, Nees Hep. Eur. Ill, p. 339 (1838). 



Thedenia Blyttii, Hartm. Skand. Fl. (1820-43). 



Blyttii Moeo'ckii, G.L.N. Syn. Hep. p. 474 (1844). 



Moerckia norvegica, Gottsch. in G. &, R. Hep. Eur. n. 295 (1863). 



Moerckia Blyttii, Gottsch. Ann. sc. nat. p. 83 (1864). 



Dilaena Blyttii, Dum. Hep. Eur. p. 138 (1874). 



Dilaena Blyttii, Dum. Hep. Eur. p. 138 (1874). 



Pallavicinia Blyttii, Lindb. Muse. Scand. p. 10 (1879) ; Kaalaas Leverm. Norge, 



p. 451 (1893). 

 Galycularia BhjttH (Moerck) St. Sp. Hep. p. 360 (1900). 



Dioicous, loosely or closely ca.'spitose, medium size, pale 

 green colour. Fronds oblong, simple or furcate, prostrate, some- 

 what thick; lobes sub-membranaceous ; costate, mid-rib ver}^ 

 prominent on the postical side ; a cross-section of frond shows 

 20-30 layers of thin (those below purple-walled) cells, gradually 

 becoming thinner near the margin where it is one layer thick ; 

 epidermic cells smaller than the inner, quadrate, large, walls firm, 

 no trigones ; margin undulate, sinuate, crispate ; radiculose, 

 rootlets numerous, close, reddish-brown. Female flowers antical ; 

 bracts surrounding the base of the perianth, undulate, plicate, 

 unequally laciniate. Perianth projecting very much beyond the 

 bracts, oval-campanulate, upper portion plicate, slightly laterally 

 compressed, composed of several layers of cells, mouth unequally 

 laciniate-dentate. Pistillidia 5-8. Calyptra thick. Capsule oval, 

 valves firm, bi-tri-stratose, lanceolate, pedicel very long. Spores 

 dark brown, verruculose. Elaters very narrow, bi-spiral, paler 

 than the spores. Male flowers antical, bracts imbricate, biseriate. 



