KEY TO THE ORDERS. XV11 



II. GAMOPETALOUS DIVISION. 



Corolla with the petals united together, in however slight a 

 degree. 



A, Calyx superior (adherent to tbe ovary). 



* Stamens united by their anthers. 



CUCCJRBITACE^E. Tendril-bearing herbs 85 



COMPOSITE; Flowers in heads, surrounded by an involucre 102 

 LoBELiACEiE. Flowers not in heads. Corolla split down 



one side 135 



* * Stamens not united together in any way. 



f- Stamens inserted on the corolla. -,-- 



DIPSACE^E. Flowers in heads, surrounded by an involucre. 



Plant prickly 101 



VALERIANACE^E. Flowers white, in clustered cymes. Sta- 

 mens fewer than the lobes of the corolla * 101 



RCBIACE.E. Leaves, when opposite, with stipules ; when 

 whorled, without stipules. Flowers, if in heads, 

 without an involucre 98 



CAPRIFOLIACE^E. Leaves opposite, without stipules ; but, 



in one genus, withappendages resembling stipules. 95 



-!- +- Stamens not inserted on the corolla. 



CAMPANULACE^E. Herbs with milky juice. Stamens as 



many as the lobes of the corolla :. 136 



ERICACEAE. Chiefly shrubby plants or parasites. Stamens 



twice as many as the lobes of the corolla 137 



B. Calyx Inferior (free front the ovary). 



* Stamens more than the lobes of the corolla. 



LEGUMINOS.E. Ovary 1-celled, with 1 parietal placenta. 



Stamens mostly diadelphous. 49 



Adlumia, in 



FCMARIACE.E. Plant climbing. Corolla 2-spurred 15 



MALVACEAE. Filaments monadelphous. Carpels in a ring. 38 

 ERICACEAE. Chiefly shrubby plants, with simple entire 

 leaves. Stamens twice as many as the lobes of 



the corolla 137 



POLYGALACME. 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 



