A. W. JEvans — Hawaiian Hepaticce of the 7'rihe Juhuloideoe. 435 



diameter, in the middle 23 x IS/x, and at the base, 26 x 18/x,, lobe of 

 bract 0.45 xO.35 ">", lobule 0.35 xO.l™"', bracteole 0.35 x 0,25"""^ peri- 

 anth 0.85 x 0.45'"'". 



On leaves or creeping among other hepatics. Oahu : Nuuanu and 

 Lanihuli (Cooke). 



Sande-Lacoste's figures and description* of Lejeunea- decursiva 

 would seem to indicate that this Javan species bore a marked resem- 

 blance to the plant just described. From a specimen of the original 

 material kindly sent me by Professor Schiffner, I find that L. decur- 

 siva is a Eidejeunea, as he has already noted, f and that it is much more 

 branched than Trachylejeunea Oahuensis ; the lobes of the leaves? 

 moreover, are more rounded, their lobules are smaller and the divis- 

 ions of the underleaves are more j^ointed. The Hawaiian species is 

 not nearly so rough as many members of the genus, but shows, 

 nevertheless, distinctly papillose cells in many places, and particularly 

 on the keels of the perianths. 



12. CHEILOLEJEUNEA (Spruce) SchifEn. 



Lejeunea subgenus C he ilo- Lejeunea Spruce, Hep. Amaz. et And. 251. 



1884. 

 Cheilolejeunea Schiffn.; Engler & Prantl, Nat. Pflanzenfam. i\ 124. 



1893. 



Plants small or medium-sized, whitish or pale green, sometimes 

 tinged with brown or yellow, closely appressed to substratum, creep- 

 ing among other bryophytes or growing in wide, thin mats : stems 

 irregularly pinnately branched : leaves more or less imbricated, the 

 lobe widely spreading, rounded at apex, entire or crenulate from 

 projecting cells ; lobule ovate to cylindrical, obliquely truncate, 

 strongly inflated : underleaves contiguous or subimbricated, medium- 

 sized, orbicular, bifid: leaf-cells rather thin-walled but usually with 

 distinct trigones : ? inflorescence borne sometimes on a short simple 

 branch without innovations, sometimes on a longer branch with 

 innovations on one or both sides ; bracts and bracteoles similar to the 

 leaves and underleaves ; perianth more or less compressed, plane or 

 with a very low keel antically, and with a low, sometimes bluntly 

 two-angled keel poslically: 3 spike terminal or intercalar}^, some- 

 times occupying the whole of a short branch. 



* Syn. Hep. Jav. 72. pi. U. 1856. 



t Conspect. Hepat. Arch. Ind. 248. 1898. 



