3 50 Of V egetation. 
Seed roots, into the radicle r, z, dy which 
radicle, when it has fliot fome length into 
the ground, does then imbibe nourifhment 
from thence $ and after it has acquired luf- 
ficient ftrength, as this tender dudile root 
is extending from z to Cy it muft neceffa- 
rily carry the expanding Seed-lobes upwards, 
at the fame time that the dilating from z 
to d makes it (hoot downwards ; and when 
the root is thus far grown, it (upplies the 
Plume b with nourifhment, which thereby 
fwelling and extending opens the lobes a r, 
a r, which are at the fame time raifed a- 
bove ground with the Plume 5 where they 
by expanding and growang thinner turn to 
green leaves, ( except the Seeds of the pulfe 
kind ) which leaves are of fuch importance 
to the yet tender Plume, that it perifhes, 
or will not thrive if they are pulled off; 
which makes it probable, that they do the 
fame office to the Plume, that the leaves 
adjoyning to Apples, Quinces and other 
fruits do to them, viz. they draw fap within 
the reach of their attradion5 fee Exper, 8 
and 30. But when the Plume is fo far ad- 
vanced in growth, as to have branches and 
expanded leaves to draw up nourifhment 5 ' 
then 
