Evans : Hepatic ae of Puerto Rico 13 



in the peculiarities of the lobule with its long apical tooth and 

 proximal papilla, in the structure and measurements of the leaf- 

 cells, in the presence of basal ocelli and in the possession of sub- 

 floral innovations. Both species, moreover, develop flagelliform 

 branches with deciduous leaves. An excellent account of these 

 branches in C. versifolia is given by Schiffner, who assumes that 

 they are leafless from the beginning. The Florida specimens, 

 however, recently recorded by the writer, * clearly show that the 

 development of these branches is the same here as in R. ftagclli- 

 formis and that the narrow and ring-like thickenings, which 

 Schiffner notes, are simply the bases of the leaves which have 

 fallen away. These deciduous leaves in R. Berteroana are also 

 destitute of lobules and almost symmetrical, but their margins 

 differ from those of R. flagclliformis in being either entire or only 

 sparingly and indistinctly dentate instead of ciliate. The margins 

 of the corresponding underleaves are also either entire or very 

 bluntly unidentate on the sides. Aside from these differences in 

 the flagelliform branches, which are among the most important in 

 distinguishing the two species, R. Berteroana differs in its smaller 

 size and dioicous inflorescence. 



Stephani's figure of Lejeunea Berteroana shows a portion of a 

 sterile stem and brings out clearly the normal peculiarities of the 

 leaves and underleaves. Although there is no indication either 



i 



here or in the original description of flagelliform branches, the 

 type material in the Gottsche herbarium exhibits a branch of this 

 character and proves conclusively that L. Berteroana and Cheilo- 



ifolia 



The perianth 



of the species is still unknown, but its close relationship to R. 

 flagelliformis seems to warrant placing it in the same genus. 



At 



any rate the structure of the lobule and the entire leaves would 

 exclude it from Odontolejeunea, and the latter character would also 

 remove it from Cyclolejettnea. 



Mem. Torrey Club 8: 145. 1902. A full description of the species, largely 

 compiled from Schiffner, may also be found here. 



