THE DIFFERENTIATION OF FLOWER-BUDS 43 



tending bract or leaf, while the upper lateral flowers are in 

 the axils of bracts and the lower ones in the axils of leaves 

 (or sometimes bracts also). (Fig. 18.) 



The pear (Pyrus communis) has its inflorescence in a 

 cymose raceme, as the flowers at the base of the cluster 

 often open first, which is the reverse of the 

 apple. The quince {Cydonia ohlonga) pro- 

 duces solitary flowers which are either 

 terminal or axillaiy. In the apricot the 

 flowers are solitary and axillary; in the 

 wild black cherry (Prunus serotina), the 

 inflorescence is a raceme; in the sweet and 

 sour cherries a fascicled umbel; and in 

 Fig. 18. — Diagram- 

 matic drawing of an 

 apple inflorescence 

 or peduncle from 

 which arise the 

 pedicelled flowers. 



e^etative 



the peach the ^'^''^^1 

 flowers are soli- T^junde 

 tary and axillary, 

 as a rule. 



43. The flower- ,,^^^,,,^.. 

 ing branch. — aiapRmarjc 

 There is not en- 

 tire uniformity as 

 to the nomencla- 

 ture of the parts 

 of the flowering 

 branch, but for 

 horticultural usage the following terms are satisfactory. 

 (Fig. 19.) 



Scale axis. — This part of the flowering branch is the basal 



