92 
VEGETABLE STRUCTURE. 
fented the white part of the Clufter feparated and at 84 the green. At 
85 the original Knot j and at 86 the Veflels running thence, and produ- 
cing the fecond. 
The whole Clufter is pyramidal, when it is perfedl: : and might appear 
to the incurious only one VelTel, 70, c. It has been fliewn how the Cluf- 
ter confifts of many; and it is for this caufe that in maceration, or even 
in a difeafcd flate of the Plant, the Clufters often break, and feparate. 
CHAP. XXV. 
The Course of the Pyramidal Clusters. 
I F we purfue the courfe of the feveral Clufters, we find them exhi- 
biting, in the macerated parts, a kind of Skeleton of the Plant; if 
that name may be given to things fo little folid. This is reprefented in 
Plate VII. Fig. 87. • 
There are twelve of thefe Clufters in the body of the Root, a; 
and fix in every Fibre, l>. The twelve in the body return upon them- 
felves at the crown, and at the bafe, c c ;. and the fix in each Fibre are 
not continuations of thefe. The Flefliy Subftance comes between, and 
they are produced from its furface in the Fibre, juft as they were in the 
body of the Root ; but communicate with thofe of the Root, by the mi- 
nute Vcftels i:/. They round its end as they did the bafe of the body; and 
return into themfelves at the crown : fo that in ftri^tnefs the fix are only 
three, and the twelve only fix. They are counted double, becaufe we 
fee them going and returning. In each Footftalk of the Leaf there are 
twelve of them, e e and in the Stem of the Flower twenty-four, 
All thefe are produced exadly as the Clufters in the Fibres of the Root : 
they are not continuations of the original twelve in the body ; but are 
formed from the Flefliy Subftance of the part wherein they lie. This is 
peculiar in Vegetables, that one portion of their fubftance can produce al! 
the others ; and it is fiom this reafon that all the parts are capable of 
growth. 
At the crown of the Root thefe Cl ifters return in an arch, intothem- 
felves. The Footftalks of the Leaves divide each into three parts at the 
head ; from which feveral portions the partial Leaves grow : and in each 
of thefe are four of the Clufters, the twelve of the Stalk being regularly 
dividcvj 
