

FLOWERS, THEIR STRUCTURE AND KINDS 171 



inserted on the inside of the corolla. In the composites the 

 calyx tube, formed by the union of the sepals, is consolidated 

 with the outer wall of the ovary, while the calyx limb or free part 

 is reduced to mere scales or hairs, or is inconspicuous. The 

 corolla tube, or "ray," formed by the union of the petals, is 

 seated on the edge of the calyx tube. The stamens, united by 

 their anthers, are joined to the inside of the corolla tube. The 

 pistil is compound as shown by the divided style, but there is a 

 single cavity with one ovule which develops into a seed. The 

 walls of the ovule (seed coats) are consolidated with the ovary, 

 thus forming a one-seed fruit known as an akene. 



