126 



. FLOWER-BRANCHES 



by a solitary flower. What are the two types of flower-clusters? What 

 are corymbose clusters? Define raceme. Spike. Head and anthodium. 

 Catkin. Panicle. Umbel. Umbellet. Corymb. What are cymose 

 clusters? What is a cyme? Glomerule? Contrast indeterminate and 

 determinate modes of branching. Centripetal and centrifugal. Explain 

 mixed clusters. What is a thyrse? Define peduncle, pedicel and scape. 

 NOTE. In the study of flower-clusters, it is well to choose first 

 those that are fairly typical of the various classes discussed in the 

 preceding paragraphs. As soon as the main types are well fixed in the 

 mind, random clusters should be examined, for the pupil must never 

 receive the impression that all flower-clusters follow the definitions in 

 books. Clusters of some of the commonest plants are very puzzling, 

 but the pupil should at least be able to discover whether the inflores- 

 cence is determinate or indeterminate. 



201. The practically sessile axillary clusters of coffee. 



