KEY TO THE ORDERS. XV11 



II. GAMOPETALOCJS DIVISION. 



Corolla with the petals united together, in however slight a 

 degree. 



A, Calyx superior (adherent to the ovary). 



* Stamens united by their anthers. 



CUCCTRBITACE.E. Tendril-bearing herbs 85 



COMPOSITE; Flowers in heads, surrounded by an involucre 102 

 LOBELTACE^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 



VALERIANACEJE. Flowers white, in clustered cymes. Sta- 

 mens fewer than the lobes of the corolla 101 



RUBIACE^:. 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 genius, with appendages resembling stipules. 95 



4- H 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 from 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 



FUMARIACE^. 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 



POLYGALAC.E. Anthers 6 or 8, 1-celled, opening at the 

 top. Pod2-celled. Flowers irregular ; lower petal 

 keel-shaped, and usually fringed at the top 48 



