34 AN INTRODUCTION 



CHAP. XIX. 

 OF AGGREGATE FLOWERS. 



COMPLETE Flowers are either simple or aggre- 

 gate. Simple flowers differ from aggregate in this, 

 that they have not any part of fructification com- 

 mon to many flowers, as is the case with aggre- 

 gate. Flowers are called aggregate, when manyjfos- 

 culi, florets, are, by the mediation of some part of 

 the fructification common to them all, so united that 

 no one of them could be taken out without destroying 

 the form of the whole, of which it was a part. The 

 common part in aggregate flowers is either the re- 

 ceptacle* or the calyx. A partial flower oi the aggre- 

 gate one is called Jloscidus, a floret. Aggregate 

 flowers are primarily divisible into seven kinds, viz. 

 1. The aggregate, properly so called. 2. The corn- 

 found. 3. The umbellate. 4. The n/w^e. 5. The 

 amentaceous. 6. Ttfegtumose. 7. The spadiccous.: 

 All which we shall explain in their turns. 



1. An AGGREGATE flower, properly so called, has 

 a receptacle that is dilate, extended in breadth, the 

 florets standing on Peduncles, foot-stalks*, as in 

 Scabiosa, Knautia, Dipsacus, Cephalanthus, Globula- 

 ria, Leucadendron, Protea, Brunia, Barreria and 

 Statice. 



2. A COMPOUND flower t is an aggregate one, 

 comprehending many florets that are sessile, squatted, 

 or without Peduncles, on a common receptacle that is 

 entire, and having also a common perianthium, but 

 furnished with Arithera? that grow together in the 

 form of a cylinder. 



* Peduncle is the foot-stalk of a flower only ; the foot-stalk 

 of a leaf is called Petiole. 



f These are the flowers of $\y class Syngenesia 5 see Part JI ? 

 Chap a 22. 



