HANDBOOK OF BRITISH HEPATIC^E. 29 



membranaceous, valves bearing the elaters at 

 the middle, inserted in a discoid stroma ; 

 elaters solitary, persistent. Dumort. Rev. 

 rung. p. 12 (1835). 



In this genus the perianth is axillary, the peri- 

 chaetial leaves distinct and opposite, not of the 

 same form as the other leaves. Branches lateral, 

 with a one-lobed, antical leaf, partly seated on the 

 stem and part on the branch. Leaves of the stem, 

 incurrent, tender, ciliate. Leaflets present. Female 

 flowers i-4-gynous. Subfloral innovations two, 

 opposite, one rarely deficient. Bracts unijugate, 

 adnate on both sides of the innovations. Pedicel 

 of two opposed strata of cells, axial, four seriate, in 

 section cruciate, sixteen smaller in the periphery. 

 Capsule with the inner face nearly even or porose. 

 j This genus is distinct from both Frullania and 

 Lejeunia, and is in some respects intermediate 

 between the two. It agrees with Lejeunia in the 

 bracts of the female flower being adnate to sub- 

 floral ramuli (or innovations), also in the incurrent 

 (not transverse) leaves, nor are there distinct 

 trigones at the cellular angles, as in every Frul- 

 lania. The apex of the pedicel is more dilated 

 than in any Lejeunia, showing a quadrate, plane, 

 or slightly concave surface, traversed by a great 

 number of diagonal lines, crossing at right angles. 

 Jubula agrees with Frullania in the axillary 

 ramification, the saccate lobule, and the mono- 

 tetragynous female flowers, it has one character 

 not found in any species of either Frullania or 

 Lejeunia, viz., the presence of an antical non- 

 lobulate leaf at the insertion of every branch, 

 seated partly on the stem, partly on the branch, 



