THE WALLFLOWER 



ID 



vegetative leaves. The flowers, unlike the ordinary 

 branches, do not arise in the axils of leaves, for there 

 are no leaves at all on the part of the plant which 

 bears theni. This is characteristic of the Wallflower 

 and its relations. In most plants the flowers, like 

 other branches, are borne in the axils of leaves. 



The way in which flowers are borne upon the stem 

 is called the inflorescence. In the Wallflower the 

 flowers are borne laterally on a main axis, and are 



FIG. 8. Flower of Wallflower. 



a, flower-stalk ; c, calyx ; 

 p, corolla; s, stamens; 



b, stigma. (After Bal four.) 



9- - 



FIG. 9. Same flower, with 

 calyx and corolla removed. 

 s, stamens ; b, stigma at 

 top of pistil ; r, receptacle ; 

 g, honey-glands at base 

 of short stamens. (After 

 Balfour.) 



stalked. The main axis terminates in a bud which 

 is continually forming new flowers as long as growth 

 continues. Thus the oldest flowers are at the bottom, 

 and the youngest at the top. An inflorescence of this 

 kind is said to be indefinite. An indefinite inflorescence 

 with a single elongated main axis and stalked flowers 

 is a raceme. 



