212 HANDBOOK OF BRITISH HEPATIC^. 



lucral bracts terminal, fusiform, 3 - 4 - jugate, 

 broadly ovate, concave, very shortly bilobed 

 at the apex, lobes incurved, obtuse, rarely rounded, 

 larger than neighbouring leaves, base slightly 

 connate, apex cut down one-third. Antheridia 

 solitary in the axils of the bracts. Pistillidia five, 

 rarely ten. Perianth variable, now and then as 

 long as the involucre, oblong, rarely closed at the 

 apex, or one side shorter and gaping, mouth lacini- 

 ate, concrete half way up with the involucre, 

 rarely wholly free. Calyptra globose-oval, smaller, 

 upper half bearing four to nine sterile pistillidia. 

 Capsule oblong-globose. 



Nardia ustulata, Spruce. 



Paroicous, rhizome creeping, stems some- 

 what erect, almost simple, clavate. Leaves 

 imbricate, oval, bilobate, sinus and lobes acute, 

 subcomplicate. Perianth immersed, apex an- 

 gular, concrete at the base, with the involucre 

 at length lobed. 



Gymnomitrium adustum, Nees Eur. Leb. 

 (partly). Marsupella ustulata, Spruce Revue 

 Bryol., 1881, p. 100 ; Carr. and Pears. Exs. 

 219. Sarcoscyphus adustus, Spruce Muse, el 

 Hep. Pyr. ; Gott. and Rab. Exs. 648 (partly). 



On rocks or stones. 



Tufts rarely green, for the most part purple 

 brown, or as if scorched, becoming more or 

 less black. Rhizome creeping, flexuous, stems 

 somewhat erect, almost simple, rarely innovant, 



