CONSPECTUS. 333 



3. Frasera, Walt. American Columbo. Species: 



Frasera Carolinensis, Walt. 



4. HaUnia^ Borkh. Spurred Gentian. Species: 



Halenia dfjlexa, Griseb. 



5. Gentiana^ L. Gentian. Species 9. 



6. Bartonia, Muhl. Species 2. 



V. Obolaria, L. Species : Obolaria Yirginica, L. 



8. Menyanthcs^ Tourn. Buckbean. Species: 



Menyanthes trifoliata, L. 



9. Limnanthemum., Gmel. Floating Heart. Species: 



Limjianthemum lacunosum, Griseb. 



ORDER LXXXrV. 



apocynaceie, or dogbanes. 

 Genera : 



\, Amsonia^WaM. Species: 



Amsonia Tabernmmontana^ Walt. 



2. Forstero7iia, Meyer. Species: 



Forsteronia difformis, A. D. C. 



3. Apocynum, Tourn. Dogbane. Indian Hemp. Species 2. 



ORDER LXXXV. 



asclepiadace^, or asclepiads. 

 Genera : 



1. Asclepias, L. Milkweed. Silk weed. Species 14. 



2. Acerates, Ell. Green Milkweed. Species 2. 



3. Fnsknia, Nutt. Species: Enslenia albida, Nutt. 



4. Gonolobus, Mx. Species 2. 



5. Feriploca, L. Species: Feriploca Grceca, h. 



ORDER LXXXVI. 



oleace^, or olives. 

 Genera : 



1. Z^iytcstrum, ToMm. Privet. Species: 



Liyustrum vulyarCy L. 



