122 



FLOWER-BRANCHES 



carrot and many other Umbelliferae, 

 there are small or secondary umbels, 

 called umbellets, at the end of each of 

 the main branches. (In the center of 

 the wild carrot umbel one often finds a 

 single, purplish, often aborted flower, 

 comprising a 1 -flowered umbellet). 



256. Cymose Clusters. When the 

 terminal or central flower opens first, 

 the cluster is said to be cymose. The 

 growth of the shoot or cluster is deter- 

 minate, since the length is definitely 

 determined or stopped by the terminal 

 flower. Fig. 195 shows a determinate 

 or cymose mode of flower-bearing. 



257. Dense cymose clusters are 

 usually flattish on top because of the 



cessation of growth in the main 

 or central axis, but cymes are 



192. Corymb of candytuft. 



193. Corymbs of the bridal wreath (spirea). 



