CYME. 105 
rays. answering to petals, and the involucre (254) to the calyx. The flowers are 
called florets, those in the outer circle, florets of the ray, and those of the central 
portions, florets of the disk. 
304. The panic.eE is a compound inflorescence, formed by an 
irregular branching of the pedicels of the raceme. Ex. oats, 
Poa, and many other grasses. 
_ 805. The truyrse is the same as the panicle, having the 
lower branches rather shorter than those in the midst, and all of 
them very compact, as in the lilac (Syringa), horse-chestnut. 
a. The umbel becomes compound when each pedicel becomes 
itself an umbel, as in most of the Umbellifere. In these cases 
the secondary umbels are called umBELLETS, and sometimes 
partial umbels. See § 254. 
By a similar decomposition, a raceme becomes a compound 
raceme, a corymb a compound corymb, &c. 
FIG. 38.— Modes of inflorescence ; 1, raceme; 2, ament; 3, spadix; 4, head; 5, panicle ; 
6, verticillaster ; 7, thyrse. 
306. Of the centrifugal inflorescence, the following varieties 
are described ; namely, cyme, fascicle, and verticillaster. 
307. Crmz. This inflorescence has the general aspect of the 
corymb, but is remarkably distinguished from it by its centrifu- 
gal evolution, and by its branches being repeatedly 2-forked 
and 3-forked, as exemplified in Hydrangea, Viburnum, chick- 
weed. 
a. The cyme is found only in plants with opposite leaves, and its normal struc- 
ture and develooment are as followe The terminal flower, which is the first to 
