&\)z gtrtelj Jtaturaltei 



Vol. III. DECEMBER, 1894. No. 12. 



A NEW HEPATIC. 



BY W. H. PE ARSON. 

 CEPHALOZIA HIBERNICA Spruce MSS. 



Dioicious, creeping amongst mosses, with few rooting 

 flagella, small, of a whitish, crystalline or pale green colour. 

 Stems stout, flexuose, ramose, procumbent or somewhat erect, 

 plano-convex, antical aspect 3 — 4 cells wide, postical with a 

 band of 4 by 5 much smaller cells ; branches postical, irregular, 

 sometimes attenuate and gemmiparous, gemmae capitate ; 

 rootlets hyaline, on the lower part of the stem, or at the apices 

 of the arcuate stolons. Leaves approximate or contiguous, 

 alternate, almost horizontally inserted, decurrent at the base, 

 subalate, plane, so that the stem appears bialate, bifid from a 

 third to the middle of the length, sinus rounded, segments 

 subconnivent or erect, sharply acuminate, apical cells 2-4 in 

 single series, texture delicate, cells large, hyaline, 4, 5 and 6- 

 sided surface, pitted when dry as in Ceph. comiivens, walls thick, 

 trigones wanting. Stipules absent. Flowers (female) terminal 

 on very short postical branches, bracts oblong, divided to about 

 two-thirds into two unequal lanceolate-acuminate segments, 

 subbract smaller, divided to about the middle, sometimes with a 

 third small segment on one side, segments acute ; bracteole 

 oblong, bifid to about the middle or entire, unidentate near 

 the middle, segments lanceolate-acuminate ; subbracteole 

 oval, divided to about \, segments obtuse, 3rd subbracteole 

 small, slightly bifid. Immature perianths only met with, mouth 

 fringed with long cilia, 12 to 15, each composed of 3 or 4 long, 

 single cells. Audrcecia on short postical branches, perigonial 

 bracts 4 — 5 pairs, closely imbricate, complicate-concave, oval, 

 bilobed to about one-third ; antheridia single, oval. 



A 



