+8 HEPATICAE 



x x Sporogone enclosed in a bag. 

 o Leaves entire. 

 \ "Leaves opposite. 



(2) 9. Gongylanthus 



58 Leaves alternate. 



{1) 10. Calypogeia 



00 Leaves bipartite or pluripartite. 



(1) 11. Tylimanthus 



II. Leaves often incubous, dentate, bifid or multifid. V inflorescence 



endogenous on a very short ventral branch. Perianth tnOStl] 

 narrow, triangular. 



1. Leaves bipartite. 



(2) 12. Cephal6zia 



2. Leaves 3—5 partite. 



x Leaves incubous. (Pig. 41, E.) 



(3) 13. Lepid6zia 



x x Leaves succubous. 



(1) 14. Psil6clada 



3. Leaves entire or dentate, 

 x Leaves incubous. 



(1) 15. Mastigobryum 



x x Leaves succubous. 

 o Stem ascending, not rooting. 



(1) 16. Adelanthus 



00 Stem creeping, rooting. 



(1) 17. Alobiella 



III. Leaves bipartite. % inflorescence acrogenous or cladogenous on 



lateral branch. Perianth folded at the mouth into 3 — 10 plaits. 



1. + inflorescence acrogenous. 



X Leaves appressed to the stem. 



(i) is. Anthelia 



x x Leaves spreading. 



(1) 19. Herberta 



2. % inflorescence cladogenous. 



(1) 20. Lepic61ea 



IV. Leaves folded into two lobes. f inflorescence acrogenous. 



1. Perianth connate with the calyptra into a fleshy indumentum. 



(1) 21. Schistochila 



2. Perianth flattened. 



(4) 22. Radula 



