Evans : Hepaticae of Puerto Rico 17 



simple and very short branch ; bracts obliquely spreading, shortly 

 and unequally bifid, the lobe convex and broad at the apex, lobule 

 variable ; bracteole longer than the underleaves but less deeply 

 bifid ; perianth compressed but with rounded lateral keels, antical 

 and postical surfaces practically ecarinate, apex broad, beak 

 obsolete : $ inflorescence occupying a short branch ; bracts few, 

 imbricated. (Name from «W<c, a bladder, and Lejeunea, referring 

 to the strongly inflated lobule.) 



When Cystolejeunea is compared with Clieilolejeunea, as repre- 

 sented by such a robust species as C. jamaicensis, the two genera 

 are seen to have much in common. They agree in texture and 

 color, in the shape of the lobe, in the general peculiarities of the 

 leaf-cells, in the absence of ocelli, in the underleaves, in the simple 

 female branch and in the flattened perianth. Aside from its 

 lobules, however, Cystolejeunea differs in its convex leaf-lobes and 

 in its beakless perianth. Of course the more delicate species of 

 Clieilolejeunea offer still other points of difference. 



Macrolejeii 



Its 



M. palles 



the Andes of Ecuador. In this plant the female branch is simple, 

 and the perianth is destitute of both beak and keels, characters 

 which it shares with Cystolejeunea. It differs, however, in its 

 general habit, in its pointed leaves and in its delicate texture, 

 agreeing in all these respects with the genera Taxilejeunea and 

 Hygrolejeunea. Euosmolejeunea and Tr achy lejeunea both differ 

 from Cystolejeunea in their five-keeled perianths. 



Cystolejeunea lineata (Lehm. & Lindenb.) 

 Jungermannia lineata Lehm. & Lindenb. in Lehmann, Pug. Plant. 



4: 53- 1832. 

 Lejeunea lineata Lehm. & Lindenb. in G. L. & N. Syn. Hep. 371. 



1845. 



{Macro -Lejeunea) 



et And 



225. 1884. 



Lejeunea (Clieilolejeunea) lineata Steph. Hedwigia 27 : 287. 1888. 

 Clieilolejeunea lineata Schiffh. in Engler & Prantl, Nat. Pflan- 



zenfam. i 3 : 124. 1893. 

 Macrolejeunea lineata Schiffh. Bot. Jahrb. 23 : 588. 1897. 



* Engler & Prantl, Nat. Pflanzenfam. i 3 : 124. 1893 (= Lejeunea pallescens 

 Mitt. Hook. Jour. Bot. and Kew Gard. Misc. 3 : 360. 1851J. 



