84 
INFLORESCENCE. 
6th. Cyme, (Fig. 90, c,) resembles an umbel in having its common 
stalks all spring from one centre, but differs in having those stalks 
irregularly subdivided ; as the snowball and elder. 
Fig. 90. 
7th. Corymb, (Fig. 90, a,) or false umbel ; when the peduncles rise 
from different heights above the main stem, but the lower ones being 
longer, they form nearly a level or convex top; as the yarrow. 
8th. Fascicle, (Fig. 90, b,) flowers on little stalks variously insert- 
ed and subdivided, collected into a close bundle, nearly level at the 
top ; as the sweet-william ; it resembles a corymb, but the flowers 
are more densely clustered. 
9th. Head, (Fig. 90, c,) or tuft, has sessile flowers heaped together 
in a globular form; as in the clover, and button bush, (cephalanthus.) 
10th. Ament or catkin, is an assemblage of 
flowers, composed of scales and stamens, or 
pistils arranged along a common thread-like re- 
ceptacle, as in the chestnut and willow ; this, 
though described under the divisions of the 
calyx, is only a mode of inflorescence. The 
scales of the ament are properly the calyxes ; the 
whole aggregate, including scales, stamens or 
pistils, and filiform receptacle, constitutes the 
ament. At Fig. 91, is the representation of the 
ament of the poplar, containing pistillate flowers ; 
this is oblong, loosely imbricated, and cylindri- 
cal; the calyx is aflat scale, with deep-fringed 
partings. At b, is a representation of the fertile 
or pistillate flower; the calyx or bract is a little 
below the corolla, which is cup-shaped, of one 
petal, and crowned with an egg-shaped, pointed 
germ; the germ is superior, and bears four 
(sometimes eight) stigmas. 
The staminate ament resembles the pistillate, except that its co- 
rolla encloses eight stamens, but no pistil. The poplar is in the 
class Dioecia, because the pistillate and staminate flowers are on 
Cyme— Corymb— Fascicle— Head— Ament. 
