152 MANUAi, OF nature; study. 



nal buds. Either of these forms may be single, or 

 solitary, or grouped in clusters. When in clusters, 

 the indeterminate take the form of raceme^ as in 

 the lily of the valley, where the flowers, each 

 upon a separate foot-stalk, are loosely scattered 

 along the floral axis ; corymb, as in hawthorn or 

 trumpet creeper, which is but a slight modification 

 of the raceme, the separate flower stalks being 

 lengthened in such a way as to allow the flowers 

 to rest in the same horizontal plane. 



What change would have to be made in the lily 

 of the valley in order to assume the form of a 

 corymb? Imagine a currant flower-cluster to be 

 changed into the form of a corymb. Explain the 

 process." > 



An Umbel is a flower cluster whose floral axis is 

 wanting. The flower-stalks or pedicels of each of 

 the several flowers arising from the same point on 

 the recepticle carry the flowers to the same height 

 as in the corymb. The parsnip and cherry are 

 good examples of an umbel. Imagine a cherry 

 flower-cluster in the form of a corymb ; what change 

 took place?" Imagine a raceme of shepherd's purse 

 in the form of an umbel ; what change occurred ? 

 ^The plantain flower cluster consists of a length- 

 ened axis along which sessile flowers are closely 

 set. Such a flower-cluster is called a Spike. How 

 must the plantain be changed in order that it may 



