A. W. Eva)is — Hawaiian Hepaticm of the Tribe Jiihuloideoe. 41 1 



TJnderleaves decurrent, reflexed at apex, 



Marchesinia Mittenii. 

 Underleaves not decurrent, plane at apex. 



ThysanantJius elongatus. 

 Undei'leaves bifid. 



Leaves sharp-pointed. 



Underleaves with broad lobes (consisting of ten to 

 many cells), the sinus not extending beyond middle. 



( Harpalejeunea. ) 

 Leaves acute to acuminate, lobule large (about 

 half as long as lobe). 



Harpalejeunea pseudoneura. 

 Leaves apiculate, lobule small (about one sixth as 

 long as lobe). Harpalejeunea Owaihiensis. 



Underleaves with slender lobes (consisting of five to 

 seven cells), the sinus extending beyond the middle. 



[Drepanolejeunea.) 

 Leaves entire or denticulate, acute. 



Drepanolejeunea Anderssonii, 

 Leaves incised-dentate, acuminate. 



Drepanolejeunea uncinata. 

 Leaves rounded at apex or very blunt-pointed. 



Leaves with two or three ocelli at base of lobe. 



Ceratolejeunea ocidata. 

 Leaves not ocellate. 



Leaves obliquely spreading. 



Leaf-cells thick-walled or papillose or both. 



$ inflorescence borne on a very short 

 branch (the vegetative leaves repre- 

 sented by a single underleaf),not inno- 

 vating or with a single, short innova- 

 tion on one side; perianth with a 

 distinct antical keel. 



Trachylejeun ea OaJiuensis. 

 $ inflorescence borne on a principal branch 

 or on a short lateral branch (always with 

 a few vegetative leaves), innovating on 

 one or on both sides ; perianth plane or 

 nearly so on antical face. 



( Cheilolejeunea.) 

 Underleaves contiguous or subimbri- 

 cated. 



