T. Holm — Studies in the Cyperacece. 



181 



There is a thin-walled hypoderm underneath the epidermis, and 

 the bark is traversed by lacunes of considerable width. The 

 endodermis has the cell-walls thickened all around, represent- 

 ing an O-endodermis, inside of which is a pericambium inter- 

 rupted by proto-hadrome. The innermost part of the root 

 is occupied by a thick-walled conjunctive tissue with a single 

 or sometimes two large vessels in the center. 



Fig. 8. Epidermis of pericarp of 

 L. maculata, seen from above, showing 

 the silica-skeleton, x 560. 



Fig. 9. Same as figure 8, but 

 seen from the side, x 560. 



In considering the anatomical structure of these four species 

 of Lipocarpha^ it seems that our genus possesses several char- 

 acters by which it may be distinguished from a number of the 

 other genera, studied so far. The species themselves, may, 

 also, be recognized in this way, their anatomical characters 

 being as follows : 





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