Page:An introduction to physiological and systematical botany (1st edition).djvu/72

 42 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.