CHAP. 118.—THE AGES OF PLANTS.
Such, then, is all that I have hitherto been enabled to
learn or discover, worthy of mention, relative to plants. At
the close of this subject, it seems to me that it will not be out
of place to remind the reader, that the properties of plants
vary according to their age. It is elaterium, as already
that preserves its properties the longest of all. The
retains its virtues forty years, centaury not
more than twelve, peucedanum3
the wild vine one year—that is to say, if they are kept in the
shade. I would remark, also, that beyond those animals which
breed within the plants, there are none that attack the roots
of any of those which have been mentioned by me; with the
exception, indeed, of the sphondyle,5
a kind of creeping
which infests them all.