KEY TO THE ORDERS. XVll 



i ZI. (lAMOPETALOUS DIVISION. 



Corolla with the petals united together, in however slight a 

 degree, 



A. Calyx superior (adlicrciit to the ovary). 

 * Siamens united by their anthers. 



Cuc[JRBiTACE.«. — Tendril-bearing herbs 8.5 



Composite; — Flowers in heads, surrounded by an involucre 102 

 LobeIjIaoe.e. — Flowers not in heads. Corolla split down 



one side 135 



* * Stamens not united together in any way. 



H— Stamens inserted on the corolla. 



DiPSACE.-E. — Flowers in heads, surrounded by an involucre. 



Plant prickly 101 



Vat,erianace/E. — Flowers white, in clustered cymes. Sta- 

 mens fewer than the lobes of the corolla 101 



RUBTACBJ;. — Leaves, when opposite, with stipules ; when 

 whorled, without stipules. Flowers, iT in heads, 

 without an Involucre 98 



CAPRlPOLrACB^. — Leaves opposite, without stipules ; but, 



in one genius, withappendages resembling stipules. 95 



+- +- Stamens not inserted o?i the corolla. 



CampanulacejE. — Herbs with milky juice. Sfcimens as 



many as the lobes of the corolla 1.36 



Uricace.'E. — Chiefly shrubby plants or parasites. Stamens 



twice as many as the lobes of the corolla. ....... 1.S7 



B. Calyx inferior (free from tlic ovary). 



* Stamens more than the lobes of the corolla. 



Leguminos.*;. — Ovary 1-oelled, with 1 parietal placenta. 



Stamens mostly diadelphous , 49 



Adlumia, in 



FcMARi-ACEiE.— Plant climbing. Corolla 2-spurred 15 



Malvace.e. — Filaments monadelphous. Carpels in a ring. 38 

 Ericace.*;.— Chiefly shrubby plants, with simple entire 

 leaves. Stamens twice as many as the lobes of 



the corolla 137 



Polygalao^. —Anthers 6 or 8, 1-celled, opening at the 

 top. Pod 2-celled. Flowers irregular ; lower petal 

 keel-shaped, and usually fringed' at the top 48 



