86 
THE FIRST BOOK OF BOTANY. 
When several flowers grow from the same flower- 
stem the inflorescence is clustered, Fig. 132. 
Point out upon the chart all the flowers that are 
clustered. 
Gather all the plants yon can find that are in 
blossom. Separate the clustered from the solitary 
flowers, and they will be ready for study. You 
should first learn the names of the parts of a flower- 
cluster. These are given in the next exercise. 
EXERCISE XXIV. 
Parts of the Inflorescence. 
You will find the parts pointed out for you in 
the pictures. 
Pedun'cle.— The stem of a solitary flower, or of 
a flower-cluster. 
Rajhis.—T he continuation of a peduncle, from 
which flowers branch off. 
Bracts. —The small leaves of a flower-cluster on 
the peduncle, or rachis. 
Involucre.— A whorl of bracts. 
Ped'icel.— One of the flower-stems in a cluster. 
Bracelets. —Yery small leaves growing upon 
pedicels. 
Receptacle. —The top of a peduncle, from which 
several flowers start together. 
Can you find upon the chart any flower-clusters 
with an involucre ? Can you find bracts or bractlets 
in any of the clusters of the chart ? 
Point out and name all the parts of the flower- 
clusters you have gathered. 
