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42
OF THE MEDULLA OR PITH.
that the moisture of the medulla varies, let the leaves be ever so flaccid. I cannot but incline therefore to the opinion that the medulla is rather a reservoir of vital energy, even in these bulbous grasses.
Mr. Knight has shown that the part in question may be removed without any great injury to a branch, or at least without immediate injury, but I have had no opportunity of making any experiments on this particular subject.
