2 20 HANDBOOK OF I'.RITISH HEPATIC/E. 



stem, somewhat smaller and more distant near 

 the base ; round or subquadrate, sometimes round- 

 ish-ovate, acutely emarginate, sinus one-third to 

 one-fourth ; lobes equal, divergent. Leaves loosely 

 imbricate, half embracing, very concave, inflexed 

 at the base. Olive-brown, lurid-brown, or pale 

 olive, smooth. Dioicous, Fertile shoots thickened 

 upwards, shortened ; involucral leaves two or three 

 pairs, suddenly enlarged, broadly ovate, lobes 

 rather obtuse, sinus acute. Involucre conspicuous, 

 ovate, of two convolute leaves, connate half their 

 length ; lobes acute, at first connivent, then erect. 

 Perianth adnate with and hidden by the outer invo- 

 lucral bracts, apex at first entire, afterwards split. 

 Calyptra obovate. Capsule very minute, pale 

 reddish-brown, valves ovate, spores brown i^fx 

 diam. Elaters bispiral, flexuous. This species is 

 rarely met with in fruit. — {^Platc ^,fig. 6^) 



Nardia adusta, N., Carr. 



Paroicous. Shoots very minute, clavate, 

 terete; leaves few, vertically imbricate, ac- 

 cresent, subcomplicate, round or broadl}^ 

 ovate, from a ventricose sheathing base, 

 acutely bilobed, the sinus angular; cells 

 large, hyaline ; involucre ovate, conspicuous ; 

 segments erect, acute, lower half adnate. 



Gymnomitrium adiistum, Nees Leberm. I., 

 120; Cooke Hep. f. 15. Acolia bixvissima, 

 Dum. Syll. p. 76. SarcoscypJins adnsfns, Spr. 

 Hep. P3'r. p. 196. NanUa adusta, Carr. Brit. 





