II 



MUSCINEJE HEPATIC^ M ARCH ANTI ALES 



57 



the receptacle and the origin of the archegonia are the same 

 as in that just described; but here the growing point of the 



FIG. 21. Fimbriaria Calif ornica. A, Plant with two fully-grown sporogonial recep- 

 tacles, natural size; B, single receptacle, X4; C, the same cut longitudinally, 

 showing the sporogonium (sp), enclosed in the perianth (per) ; D, nearly median 

 section of a young receptacle, showing one growing point (.V) and an arche- 

 gonium (or); L, air-spaces; st, a pore; r, rhizoids, X4o; E, the growing point of 

 the same with an archegonium, Xsoo; x, the apical cell. 



branch forms the forward margin of the receptacle, and the 

 stalk is a direct continuation of the axis of the branch. Upon 



