38 
SKKDS OF PLANTS. 
The seed 
radicles are 
but few. 
is divided into three parts, the middle being the largest, and 
forming a cylinder, through wliich the sap flows continually, . 
■while the two sides are dedicated to the creating the seeds : 
these sort of roots generally, run in a horizontal direction, and 
many of them sui round the higher pait of the tap root, and 
thus lay up in the second root, that mailer to be used in any 
emergency, or when the radicles are renewing; the seeds on 
quitting the alburnum in the root, enter the same vessel in the 
stem: it is well known, that this cylinder lines the interior of 
the bark, forming a sort of intervening part, which is alternately 
liquid and jelly', but which in both cases, is contained in vessels 
surrounded by a twisted exterior, within which the seeds pass 
tied to a thread of the line of life ; there being five or six of 
these stems within each vessel. My mentioning the single 
vessel, and then the cylinder may make a confusion in the 
explanation of tlie form of the alburnum, as well as of the line 
of life j to avoid which, I shall here explain the meaning of 
Torm of the both ; both are cylinders surrounding the stem in their appro- 
ttw'afbimuirn, P*'**^'^ places ; both are divided into separate vessels, each con- 
.-ind the liucof taining their allotted ingredients, and, therefore, may be 
mentioned as the cylinder composed of such a quantity of 
vessels, eras one of the aggregate number. They soon reach 
from the bottom to the top of the tree, and the seeds are fasten- 
ed on them as currants on a stalk, or as grapes on a vine ; for 
they have all their peculiar arrangements according to the form 
they present in the pericarp ; the line with its accompanying 
seeds, running up in a few', or many divisions ; and that line or 
vessel, is the one through which the joint juices of the stamen 
and pistil afterw'avds convey the matter to impregnate the seeds. 
How the seeds When the seeds are passing from the root to the stem, they 
hail!; oil tlieir appear in very great numbers, and are very conspicuous, causing 
stalks. much variation in the interior ; in a young plant, the undulat- 
ing form withiti, is even marked in the hardened kind at this 
time, and makes the constant motion very conspicuous. But to 
see this perfectly the tree must not be cut ; it is only in tet.ring 
one, that in splitting it open from the root to the higher 
branches, it displays itself j then the change of each part is most 
plain 
Proper to 
tear tlic tree 
open. 
