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MANUAL 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 
