142 
VEGETABLE STRUCTURE. 
We have traced the courfe of Juices in a Plant wherein they made a 
very diort circuit, having only the head of the Root, the Bud for flower- 
ing, and the Fibres, for their fphere of motion, during the flowering flate: 
In this I lant the Flower has its Stalk, and there are diftincft Leaves upon 
their Footflalks ; as well as a large Leaf immediately under each Flower : 
therefore here is a larger circuit for Circulation, and rr.ore compafs for ob- 
fcrvations and experiments. There is alfo the advantage of larger parts, in 
which every thing is more confpicuous. 
With this Plant before us, we may form fome idea of the extream fim- 
plicity of the other. It will appear, by the obfervations we lhall have op- 
portunity to make, on the Anemone, and the more complex Plants, that 
befide, and beyond the fyflems of Circulation, there arc continued certain 
growths of the Plant, in which the reciprocal adtions of evaporation and 
abforption alone take place : and, in fome degree, the fame thing is, indeed, 
the cafe even in that fpecies j tho’ the whole feene of adtion in this refpedf, 
is there confined to the Flower. The fyftem of circulatory Juices there, 
is carried no farther than fiom the Receptacle of the P'lower to the Fi- 
bres: the whole P'lower being fed from that fyflem, and ferving as the 
Leaves, and upper growth of other Plants, to perfpire in the day, and, in 
fome degree, to abl'orb in the niglit, the watery Juices. This, therefore, 
was what we called the firfl: and limplefl: courfe of the Juices in a vegetable 
body : in the Aconite we find a fecond : for tho’ there is but one fyflem 
of Circulation in the P'lefli Vefllls in thi. Plant, which is carried on in 
the body of the Root, and wliich feeds all the refl of the Herb ; yet there 
is a partial return of Juices to this abfolute fyflem, by means of tliofe Vef- 
fels which run into the Leaves j and which, as in all other Plants, return 
again into the Flefli of the Root from which they rife. 
This may explain the purpofe wherewdth the Winter Aconite was 
chofen for this place : but to underfland all the particular-, we mufl fit ft 
entertain a diflindt notion of the conflru6ion and fcveral paits of the Plant. 
'Phe Winter Aconite confifls of five parts, i. a Root; 2. Radical 
Leaves ; 3. a Stalk ; 4. a Leaf, which has ferved as a Cup to the P'lower 
Bud ; and 5. the P'lower. 
The Anemone, of which we fliall treat hereafter, has originally fuch 
a Leaf, ferving as a Cup : but when flowering it riles by a new Stalk 
from that Cup-Leaf ; the Flower of this, on the other hand, remains 
always clofc upon its bofom. The entire Plant, in P'lower, is repiefented 
at Plate XI. Fig. i. 
The 
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