264 HANDBOOK OF BRITISH HEPATIOE. 



Riccardia palmata, Carr. and Pears. Exs. 

 No. 204. 



var. polyblasta, Nees. 



On dead trees. 



var. y (?) conferta, Nees. 



On dead trees. 



Dioicous, small, opaque. Fronds with a short 

 and narrow stipe, divided into narrow linear 

 palmate segments, very often gradually narrowed 

 towards the apex, and rather acute, scarcely 

 emarginate, biconvex, gonidia produced on both 

 surfaces, but almost always on the superior parts. 

 Cells small, rounded, perichaetial bracts numerous, 

 Calyptra small and densely warted. Andraecium 

 linear. — {Plate J, fig. 91.) 



Aneura latifrons, Lindb. 



Autoicious, rarely paroicous, large, pellucid. 

 Frond long and broad, divided into broad 

 staghorn-like lobes, mofre or less oblong, 

 wedge-shaped, very obtuse and emarginate, 

 plano-convex. Cells large, oblong-rhomboid ; 

 perichaetial bracts few ; calyptra large and less 

 verrucose. Andraecium narrow, oblong, almost 

 always affixed to the side of the perichaetium. 



Aneura palmata major, Nees Hep. Eur. III., 

 459. Riccardia palmata, Carr. in Seem. Journ. 

 III., 302 ; Hook. Brit. Jung. t. 45, fig. 4, 7 

 and 12. Riccardia latifrons, Lind. Not. Soc. 



