808 



XXII. NAIADES. 



Najas. 



i flower witb outer perianth 



tmmed back (mag.)* 



Najas. Fruit, 



entire and with open epicarp 



(mag.). (A. Braun.) 



P/mcagrosiis, 



Base of leaf, outer 



face (mag.). 



Pkucagroslis. 

 Base of leaf, inner 

 face, showing the 



scales (mag.). 



iVcr/a*. Embryo, entire and cut vertically (mag.). 



Phucagrostis vwijor, 9 plant. Bomet.) 



Pkucagroslis. 



Conferroid pollen. 



(Bornet.) 



