412 A. W. JEvans — Hawaiian Hepaticm of the Tribe Jubidoidece. 



Leaf-lobes about 1°"" long and 

 0.5°^" wide; cells with thin walls 

 and scarcely evident trigones. 

 Gheilolejeiinea stenoschiza. 

 Leaf -lobes 0.5-0.6'"'" long, 

 0.4-0.5"^'" wide ; cells wath 

 somewhat thicker w^alls and 

 more distinct trigones. 



Cheilolejeim ea in tertexta. 

 IJnderleaves distant. 



Leaf-cells with large, consjjicuous 

 trigones. 



Gheilolejeunea Haioaica. 

 Leaf-cells thin-walled, without 

 trigones. 



Cheilolejeunea Sandv icensis. 

 Leaf-cells thin-walled, not papillose, sometimes 

 with small trigones. (Zejeiinea.) 



Underleaves bifid to beyond the middle; 

 leaf-cells without trigones ; perianth 

 retiise at apex. Lejeunea Pacifica. 

 Underleaves bifid to about the middle; 

 leaf-cells with small trigones; perianth 

 not retuse at apex. 



Lejeunea anisophylla. 



Leaves erect-spreading. 3Iicrolejeunea albicans. 



Underleaves absent, ( Cololejeunea.) 



Lobule more than half as long as lobe. Cololejeunea Cookei. 



Lobule less than half as long as lobe. 



Lobe not hyaline-margined, stylus reduced to a single cell, 

 often obsolete. 



Lobe less than twnce as long as broad. 



Perianth strongly compressed, with a low, broad, posti- 

 cal keel, deeply emarginate at apex; inflorescence 

 autoicous. 



$ inflorescence borne on a very short branch, with 

 a short sterile innovation; leaf -cells with con- 

 spicuous trigones. Cololejeunea obcordata. 

 ? inflorescence borne on a principal branch, inno- 

 vating on one side, the innovation often florifer- 

 ous; leaf -cells without trigones. 



Cololejeunea ceatocarpa. 



