J. Le Conte, in a list of four hundred and fifty plants, collected by him on the island of New York (Manhattan), and published in the "Medical and Philosophical Register," Vol. II, 1812, mentions a hybrid walnut among the number. Dr. John Torrey, in "Catalogue of Plants," etc., 1819, refers to this tree under the name of _Juglans hybrida_, and says that it is growing near where Eighth avenue intersects the road called Lake Tours, about three miles from the city, and is a large tree. This specimen probably disappeared long ago, and we have no means now of determining its origin or between what two species it was a hybrid. Recently Prof. C. S. Sargent has discovered other hybrid walnuts in the neighborhood of Boston, and figured and described one in _Garden and Forest_ for Oct. 31, 1894. He says: "My attention was first called to the fact by observing that a tree which I had supposed was a so-called English walnut (_Juglans regia_), in the grounds connected with the Episcopal school of Harvard college, at Cambridge, was not injured by the cold of the severest winters, although _Juglans regia_ generally suffers from cold here, and rarely grows to a large size. This individual is really a noble tree; the trunk forks, about five feet above the surface of the ground, into two limbs, and girths, at the point where its diameter is smallest, fifteen feet and two inches. The divisions of the trunk spread slightly and form a wide, round-topped head of pendulous branches of unusual symmetry and beauty, and probably sixty to seventy feet high. A closer examination of this tree showed that it was hardly to be distinguished from _Juglans regia_ in habit, in the character of the bark, or in the form and coloring of the leaves, and that the oblong nut, with its thick shell deeply sculptured into narrow ridges, was the slightly modified nut of our native butternut, _Juglans regia_. Two other trees with the same peculiarities were afterwards found. One is a large, wide-spreading specimen, with a trunk diameter of four feet three inches about two feet above the surface of the ground, and just below the point where it divides into three large limbs. This is on the grounds of Mr. Eben Bacon of Jamaica Plain, and is supposed to have been planted between fifty and sixty years ago. The other has a tall, straight trunk, with a diameter of three feet one inch at three feet above the surface of the ground, and is growing on a farm near Houghton's Pond, in Milton, at the base of the southeastern slope of the Blue Hills."