m 
PRINCIPIA 
called a simple umbel, when it hath no lesser divisions; a 
compound umbel when each peduncle is subdivided at its ex¬ 
tremity into many lesser peduncles for supporting the flowers, 
so as to form several little umbeilas, uniting in one head ; the 
whole together is called an universal umbel, and the little 
umbeilas are called partial umbels. (See the class pentandria, 
order digynia). In some genera, that have radiated flowers, 
the florets of the centre and those of the circumference, differ 
both as to sex and size ; but in general each hath five petals, 
five stamina, and two styles, or one that is bifid (two-cleft), 
with a germen placed beneath, and two naked seeds, which 
when ripe, separate below, but remain connected at the top. 
4th. Cymous aggeegate, (from cyma, a sprout) called 
by Linnaeus a receptacle, is when several fastigiate peduncles 
proceed from the same centre, like the umbel, and rise to 
nearly an even hight; but unlike the umbel, the secondary 
or partial peduncles proceed without any regular order,* as in 
sambucus, viburnum, &c. 
5th. Amentaceous aggregate, are such flowers as 
have a long common receptacle, along which are disposed 
squamse or scales, which form that sort of calyx called an 
amentum or catkin, as in corylus, pinus, juglans, &c. Amen¬ 
taceous flowers generally want the petals, and all of them are 
of the classes monoecia and diaecia. 
6th. Glumous aggregate, are such flowers as proceed 
from a common husky calyx belonging to grasses, called glu- 
ma ; (see class trian. digyn.) many of which are placed on a 
common receptacle called rachis, collecting the florets into 
the spike, as triticum, hordeum, secale, lolium, &c. 
7th. Spadiceous aggregate, are also such flowers as 
have a common receptacle, protruded from within a common 
calyx, called spat ha, along which are disposed several florets ; 
such a receptacle is called a spadix, and is either branched, as 
in phoenix, or simple, as in narcissus, &c.: In this last case 
* Cymous flowers have no common calyx, yet each floret hath a perianthium 
(generally very small) either above or below the germen. In sambucus, and vi¬ 
burnum it is placed above. 
