204 HANDBOOK OF BRITISH HEPATIC.^. 



sinus, margins entire (fig. 144). Amphigastria large, 

 spreading, lanceolate-acuminate. Diocious. In- 

 volucral bracts two, the upper one adnate at the 



base ; segments acute, sharply 

 dentate. Perianth contracted 

 above, at length faintly 3-4 

 plicate ; apex slightly crenate, 

 splitting on one side. Calyp- 

 tra connate. Capsule oval, deep 

 brown ; spores spherical, ru- 

 fous brown, lOft diam. Ela- 

 ^^^- ters bispiral. Male plants dis- 



tinct, densely caespitose. 



Genus 29. SACCOGYNA, Dumort. 



Involucre none. Perianth affixed laterally 

 by the margin of the apex, saccate, pendu- 

 lous, naked, smooth, or everywhere pilose ; 

 mouth circular, base connate with thecalyptra, 

 not bearded at the insertion. Capsule naked, 

 four-valved, valves straight. Elaters double, 

 naked, deciduous. — Dumort. Comni. p. 113 

 (1822) ; Hep. Eur. t. 3,/ 33. 



Dioicous. Perigynium at first bud-like, inferior, 

 proceeding from the axil of an amphigastrium, at 

 length oblong, pendulous, fleshy, sublateral, shortly 

 stipitate, surmounted by the remains of the in- 

 volucral bracts. Perianth wanting. Calyptra con- 

 nate, for most of its length with the outer walls, 

 the dome-like apex alone free. Capsule oblong, 

 quadrivalvate. Male spikes minute, inferior, rising 



