72 



INFLORESCENCE. 



Cyme is produced when a single flower at the top of the 

 stem has two branches, one on each side, which in turn sub- 

 divides in the same way. (Fig. 112.) 



Fascicle differs from the cyme only in shortening the pe- 

 duncles, which brings the flowers into a more compact form, as 

 in the Pink. 



116. Indeterminate inflorescence is characterized by the con- 

 tinued growth of the primary axis, while the secondary and 

 tertiary axes are arrested. 



The spike is of this form, and is supposed to be produced by 

 the continued elongation of the primary axis, while the second- 

 ary, having no power of elongation, produces sessile flowers 

 along a common axis, which constitutes the spike (Fig. 118), 

 as in the Plantains. 



Fig. 113. 



Fig. 114. 



Fig. 115. 



Spike. 



Spadix. 



When sessile flowers are arranged on a filiform rachis, which 

 falls off after flowering, it is called an ament or catkin, as in the 

 Willow, Hazel, <fec. (Fig. 114.) When a fleshy axis is densely 

 covered with flowers, inclosed in a spathe, it is called a spadix, 

 as in the Arum. (Fig. 115.) 



If the secondary axes are equally developed around the pri- 

 mary, as in the Currant and Hyacinth, we have the raceme 

 (Fig. 116) ; the raceme differing in no respect from the spike, 

 but in having pedicellate flowers. 



What is a cym< 

 rteuco ? What is a 



A fascicle? — 116. What is indeterminate inflores- 

 An ament ? A spadix ? A raceme ? 



