THE DICOTYLEDOXES 



1849 



The calyx is small and consists of five minute sepals, the odd sepal 

 being posterior. In many the calyx is absent. 



The corolla (Fig. 1754) is polypetalous, with five petals which are 

 usually white or yellow in colour. They may vary in size, two being longer 

 than the other three. The tips are often reflexed. 



Fig. 1753.— Floral diagram of Fig. 17 s-{-—Heracleum. Flower in longitudi- 



Ervngium. L mbelliferae. j^^j section 



{After Eichler.) 



The androecium is composed of five stamens and the anthers are 

 introrse. The pollen grains are ellipsoidal with three equatorial stoppers 

 over pores through which pollen tubes may emerge. 



The gynoecium is bicarpellary and syncarpous. The ovary is bilocular 



Fig. 1755. — Foetiiciilum iul<jai-e. Fennel. Transverse section of the cremocarp 



fruit. 



