INTRODUCTION. 
*3 
them into one head, refills only from their riiin ^ from one Receptacle 
or Swoln Top of the Stalk, 2. c. and being enclofed in one great 
Cup. 
Let him proceed farther, by teafing off fome of the Flowers, and 
he will lay bare the Receptacle in part, as at Fig. 3. a . and let him af- 
terwards, if he pleafe, cut open the Head perpendicularly, and he 
will fee that this Receptacle is as reprefented at Fig. 4. a. nothing 
more than the Swoln Crown or Head of the Stalk. 
This D ffedtion is not needful to his underfhnding the Chandler of 
the Clafs, for he knew it was an Aggregate, when he faw at Fig. 2. 
the feparate Cups of the Flowers: but it will prevent doubt, that the 
Head of Tea fell, or any fuch Plant, a {Turned a different nature for 
being extended in length. He will fee that the exterior form of Teafell 
at 5 and 6, do not more perfectly agree with thofe of Scabious, at 
1 and 2. than the inner conflrudtion at 7 and 8, with the inner flrudture 
of Scabious at 4. 
The Claflical form, being now perfectly underflood, we may pro- 
ceed to the fubordinate Diftindtions of Orders. 
Though the Common or General Cup of the Aggregate Clafs is alike 
or nearly alike in many, there are great differences in the feparate Cups 
of the diftindt Flowers. Thefe differences are fufficiently obvious and 
certain, to give the Charadters of abfolute diftindtion among the Plants, 
into a number of fubdivifions. In fome, this particular or feparate Cup 
is hollow and plain ; in others, it is folded ; in others, it is limply cut 
down into one feries of Segments j in others, there are two or more 
ranges ; and there are fome, in which this feparate Cup, is only one 
hollow leaf ; and others, where it is compofed of feveral fuch hollow 
Leaves. 
These diftinctions will give a fixed and certain divifion of the Cla r s, 
into no lefs than feven feparate Orders, which will greatly eafe the 
fearch after any particular Plant. 
The 
