190 FOUNDATIONS OF BOTANY 
compound flower. This belief gave rise to the name of 
one family of plants, Composite, that is, plants with com- 
pound flowers. In such heads as those of the thistle, the 
cud weed, and the everlasting there are no ray-flowers, 
and in others, like those of the dandelion and the chicory, 
all the flowers are ray-flowers. 
201. Compound Flower-Clusters. — If the pedicels of a 
raceme branch, they may produce a compound raceme, or 
A B Cc D 
Fic. 136.— Diagrams of Inflorescence. , 
A, panicle; B, raceme; C, same umbel ; LE, head. 
panicle, like that of the oat (Fig. 434). : Other forms of 
compound racemes have received other names. 
An umbel may become compound by the branching of 
its flower-stalks (Fig. 135), each of which then bears a 
little umbel, an wmbellet. 
202. Inflorescence Diagrams. — The plan of inflorescence 
may readily be indicated by diagrams like those of Fig. 136. 
The student should construct such diagrams for some rather com- 
plicated flower-clusters, like those of the grape, horse-chestnut or 
buckeye, hardhack, vervain, or many grasses. 
1 Panicles may also be formed by compound cymes (see Sect, 204). 
