MONOECIA. 

 CLASS XXL 



STAMINA AND PISTILLA IN SEPARATE 

 FLOWERS, BUT BOTH GROWING ON THE 

 SAME INDIVIDUAL PLANT. 



This Class has ten Orders. 



ORDER I. 



HORNED POND-WEED, Zannichellia palus- monaw- 



tris. Of this genus there is only this one species, and ," 



this is the only British plant of this Order : it grows 0ne stamen. 

 in ditches and stagnant waters, and blossoms in June 

 and July. It has no corolla, but at the base of its long 

 linear leaves it produces a Calyx with one stamen and 

 four pistilla, which is the fertile flower, and a Calyx with 

 one stamen without any pistilla, which is the barren 

 flower, constituting the character of the Class : with 

 the figure of the plant, these parts are represented 

 enlarged for the sake of illustration. 



This plant was named by Micheli, in honour of 

 Giov.Jeronymo Zannichelli., an apothecary of Venice, 



