SECT. II 



PHANEROGAMIA 



649 



appendages forming a corona. The pollen of each pollen-sac is united 

 into a pollinium, the stalk of which is attached to a glandular swelling 

 (adhesive disc) of the angular stigma. 



Fir,. 084. — yferium oleander (^ na,t. size). Foi^oxocH. 



These adhesive discs alternate with the stamens so that the two pollinia attached 

 to each disc belong to the halves of two adjoining stamens. Visiting insects 

 remove, as in the Orchidaceae, lie pollinia and carry them to another flower 

 (Fig. 686). 



Important Genera. — Vincetoxicum officinale (Fig. 687) is a European herb 



