PELLIA. 443 



I. Pellia epiphylla (//.), Ijiidh. 



Juagennania epijihijUa. L. 8p. pi. ed. 1, 2, p. 1135 (175;5). 



J^ellia epiphylla, A forma Dillenii, Gottsch. in Hedwigia, ]>. Ci'.t (isilT). 



Pellia ejnphylla, Lindb. Hep. in Hib. p. 534 (1874) ; Limpr. in Colin Kr\ [)t. 



Scliles, 1, p. 328 (187G). 

 Marsilia epijjhijlla, Lindb. Muse. 8cand. p. 10 (187!)). 



Monoicous, growing in spreading, flat patches, largish, deep 

 green in colour. Fronds imbricating, and matted together by 

 means of their rootlets, simple or irregularly once divided, 

 segments oblong or broadly cuneate, margin entire near the base, 

 near the apex irregularly incised, sinuate or sublobate, broadly 

 nerved, near the middle 14-16 cells thick, gradually becoming 

 thinner towards the margins; texture submembranaceous, cells 

 largish to large, 4-, 5-, and 6-sided, elongate, w^alls thin, no 

 trigones ; radiculose, rootlets brownish white, numerous, close, 

 short. Involucre proceeding from the antical side of the frond, 

 near the apex or more rarely the middle, subcylindrical, plicate, 

 mouth slightly dilated, irregularly inciso-dentate. Calyptra ovate, 

 when older oblong, tuberculate, exserted, carnose, composed of 

 several layers of cells. Pedicel long, hyaline, 18 cells thick. 

 Capsule spherical, pale greyish-brown, dividing into 4 equal, ovate 

 valves, which soon recurve, outer layer composed of hexagonal 

 cells, whose corners are thickened, inner layer with elongated 

 cells containing numerous semi-spiral rings. Elater-bearers for 

 some time persistent at the base of the capsule, 20 to 40, in a 

 dense entangled mass, brownish colour, irregular in length, at 

 the free end conical, obtuse, usually with 1 or 2 brown spiral 

 threads, sometimes 3 or 4, rarely 5 or 6, at their free end, they 

 are more or less uncinate, holding some of the true elaters and 

 spores for a longer or shorter time back. Elatei's very long, 

 slender, twisted, usually bi-spiral. Spores oval, greenish-yellow, 

 finely muriculate. Male flowers situated on the antical surface of 

 the frond and always confined to the nerve, in which the antheridia 

 are imbedded irregularly in two rows. 



Fruits in Spring. 



