A. W. Evans — Hawaiian Hepaticce of the Tribe Juhuloidece. 395 



Key to the Species. 



Lobule inflated in upper part only, the lower forming a more or less 

 distinct, plane expansion ; perianth with two distinct postical keels; 

 inflorescence autoicous. 



F. ( Chonanthelia) Aongstroemii. 

 Lobule inflated throughout, attached to the lobe by a very short, 

 almost transverse keel. 



Lobule galeate (about as broad as long) ; perianth with one or 

 two postical keels ; inflorescence dioicous. 



Perianth slightly roughened on the keels, otherwise smooth; 



leaves not squarrose. F. [Trachycolea] Oahuensis. 



Perianth distinctly tuberculate ; leaves more or less squar- 

 rose. F. [Trachycolea) Sandvicensis. 

 Lobule clavate (longer than broad) ; perianth with a single posti- 

 cal keel; inflorescence autoicous. 



Lobule distant from axis and parallel; lobes sharp-pointed; 

 underleaves contiguous or imbricated ; branches not 

 microphyllous. F. [Diastoloba) apiculata. 



Lobule close to axis and parallel ; lobes rounded at apex ; 

 underleaves distant or contiguous but not imbricated 

 (except near the end of a stem or branch); branches not 

 microphyllous. F. [Diastoloba) Meyeniana. 



Lobule distant from axis and widely spreading ; lobes blunt 

 or apiculate at apex; underleaves imbricated; some of 

 the branches microphyllous and of short, limited growth. 



F. [Diastoloba) hypoleuca. 



I. Subgenus Chonanthelia Spruce. 



1. FruUania Aongstroemii sp. nov. 



Frullania Sandvicensis Angstr. Of versigt af Kongl. Vetensk. Akad. 

 Forhand. xxix. Haft 4, 28. 1872 (in part). 

 Plate XLIV., figs. 1-11. 



Autoicous : plants growing in wide depressed tufts, greenish, 

 tinged with yellow or brown : stems irregularly pinnately branched : 

 leaves imbricated, not squarrose, the lobe ovate, arching over the 

 stem, but scarcely or not at all cordate at base, decurved at the 

 rounded apex, entire, connected with the lobule by a long fold par- 

 allel with the stem; lobule galeate above, and forming a plane 

 triangular expansion below ; hood extending to the middle of the 



