322 The Botanical Gazette. [June, 
cited, it will be seen that in general habit it differs from Rhi- 
pictina from the fact that, although the whole plant arises 
eg a single cell attached by rhizoids to the substratum (fig. 
‘ ), this cell is undifferentiated and similar, except at its 
PASE. CO € segments of the filaments; although its wall 
4 ‘aici; considerably thickened. In comparing the type 
hat ing also, it is evident that it is fundamentally different 
¢ whole plant being a several times compounded umbel, 
. so peculiar in that it applies itse 
Cogonium near the apex of the latter, which it perforates as 
4 
