DIVISION I 



EXOGEXS, OR DICOTYLEDONS. 



Class L of the Exogens : Angiosperms, consisting of 

 three sub-classes — that is, the Polypetalous, Gamopetalous, 

 and Apetalous Exogens. 



SUB-CLASS I 

 Polypetalous Exogens. 



ORDER I. 



eanunculace^, or crov/foots. 

 Genera : 



1. Atragene, Sims, represented by the species: 



Atragene Americana, Sims. 

 (Clematis verticillaris, D.C.) 



2. Clematis, L. Virgin's Bower. Species 5. 



3. Pulsatilla, Tourn. Pasqne-Flower. Species : 



Pulsatilla Nuttalliana, Gray. 

 {Anemone, D.C.) 



4. Anemone, L. Anemone. Wind-Flower. Species 6. 



5. Hepatica, Dill. Liver-Leaf. Species 2. 



6. Thalictnim, Tourn. Meadow-Rue. Species 3. 



