XIX 



THE CLASSIFICATION OF PLANTS 



263 



Androsdum. Free, 5, epigynous, alternating with the 

 petals. 



Gynoscium. Syncarpous, carpels 2, inferior, ovary two-celled, 

 with one ovule in each cell. 



Fruit. The fruit is a schizocarp which splits into two meri- 

 carps. Seeds with endosperm. 



FIG. 254. Water-Parsnip (Sium latifolium). (Half nat. size.) (S.) 



Pollination. The flowers are small and crowded together. 

 Honey is produced by an enlarged disc, the nectary. The 

 honey being freely exposed, the flowers are visited by short- 

 tongued insects, which cross-pollinate the flowers. The principal 

 insects which visit the flowers are flies, beetles, and wasps. 



