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CERATOPHYLLACE.E. 



ORDER XXIX. CEBATOPHYLLACE^E. THE 

 HORN-WORT TRIBE. 



Stamens and pistils in separate flowers, but on the 

 same plant (monoecious) ; calyx many-parted ; corolla 



CERATOPHYLLTTM DEM^RSUM (Common Horn-wort). 



none ; stamens 12 20, without filaments ; anthers 

 2-pointed ; ovary 1-celled : style curved ; seed-vessel nut- 

 like, 1-seeded, not opening. This Order contains only 



