FLORA 



NORTH AMERICA. 



EXOGENOUS OR DICOTYLEDONOUS PLANTS 



CONTINUED. 



Section IL MONOPETALOUS EXOGENOUS PLANTS. 



Floral envelopes consisting of both calyx and corolla ; the 

 latter composed of united petals* (monopetalous or gamope- 

 talous). 



L Calyx adherent to the ovary {ovary inferior). ■[ 

 CONSPECTUS OF THE ORDERS IN THIS DIVISION. 



* Ovary with 2 or more cells, and 1-many ovules in each, or ly abortion 

 1-celled. Stamens inserted upon the corolla. Seeds albuminous. Leaves 

 opposite. 

 Stipules none. 72. Caprifomace.s:. 



Stipules intei-petiolar, or simtilating the leaves. 73. RoBiACEa:. 



Stipules 1 1 to 3 on each side, entirely similar to the 



leaves and fomiing with them a verticil, Subord. Stellat.e. 



Stipules between the petioles. 



Ovary coherent. Subord. CiNCHONE.ffi:. 



Ovaiy nearly free from the calyx. Subord. Loganie^. 



* A few Ericaceffi, a portion of Plumbaginaceoe, some Aquifoliacea;, &c., are 

 polypetalous, or nearly so. 



t In a few RubiaceEc the ovaiy is partly, and in tHe suljorder Loganiea; com- 

 pletely, free from the calyx : in some Dipsacea; the apex of the ovary is coherent 

 with the calyx, while the lower portion is free. On the other hand, one or two gen- 

 era with an adherent calyx, such as Vaccinium, Hopea, and Halesia, belong to or- 

 ders which have for the most part a free ovary. 



VOL. II.-l 



