The ‘bleeding’ of trees through injury


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ABSTRACT MORE than two years ago there was a short correspondence in NATURE (113, pp. 492 and 604) on the bleeding of trees in the spring through injury. The trees especially mentioned were


the sycamore and birch. It may be of interest to record the fact that the common walnut (_Juglaus regia_) may be included among the ‘bleeders—at any rate, the specimen I have had under


observation behaved markedly so. Casually severing a twig of this tree in mid-spring, 1925, I was a little surprised to find that sap immediately exuded. On February 1 last this tree for


certain reasons had reluctantly to be felled. As the walnut is late in coming into leaf and adapted to a climate warmer than Cumberland can afford it, it was scarcely to be expected that so


early in the year there would have been any exudation of sap. My surprise therefore was great to find such an outflow, on the application of the crosscut-saw to the base of the trunk, as to


cause the sawdust to become quite moist. In addition, as the woodmen lopped off the branches of the felled tree, sap issued so freely from the cut surfaces that it could have been collected.


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Wigton, Cumberland JOHN PARKIN Authors * JOHN PARKIN View author publications You can also search for this author inPubMed Google Scholar RIGHTS AND PERMISSIONS Reprints and permissions


ABOUT THIS ARTICLE CITE THIS ARTICLE PARKIN, J. The ‘Bleeding’ of Trees through Injury. _Nature_ 118, 878 (1926). https://doi.org/10.1038/118878d0 Download citation * Issue Date: 18 December


1926 * DOI: https://doi.org/10.1038/118878d0 SHARE THIS ARTICLE Anyone you share the following link with will be able to read this content: Get shareable link Sorry, a shareable link is not


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