808 



XXII. NAIADES. 



Jitlfat. 



flower with outer perianth 

 turned back (mag.). 



Najas. Fruit, 



entire and with open epicarp 

 (mag.)- (A.. Braun.) 



Nqjas. ,J flower 

 expanded, ehiscent 

 (mag.). (A. Braun.) 



Anther 

 covered by the 

 perianth (mag.). 



Pkucagrostif. 



Base of leaf, outer 



face (mag.). 



Phucagrostii. 

 Base of leaf, inner 

 face, showing the 



scales (mag.). 



Najat. Embryo, entire and cut vertically (mag.). 



Phucagrottis major. 9 plant. Hornet.) 



Phucagrottis. 



Confervoid pollen. 



(Bornet.) 



