Other Species
The Persian (English) walnut, Juglans regia, and the Japanese walnut, J. sieboldiana, are both planted to some extent throughout the entire east and north, but neither promise to assume special prominence in this zone. Fine appearing trees in small numbers or occasional orchards of the former may be seen in many places. These are usually near large bodies of water, as within a mile or so, or two or three at most, of the shores of the lower Great Lakes, the Finger Lakes of New York, Long Island Sound, and various rivers and other smaller bodies of water within this general section. They are also to be found near buildings, especially in villages and small towns, but as orchard trees, or even single specimens out in the open, they are almost never met with except possibly while very young.
The Japanese walnut is likewise little more than a novelty in this region. It is probably somewhat more hardy than is the foregoing, but it is not its equal in desirability. It grows rapidly under favorable environment, often becomes a handsome ornamental, comes into fruit while young, and bears freely but seldom heavily. The nuts are small, variable in character, and not particularly popular on the market. In flavor the kernels resemble butternut, but are much more mild. The nuts of this species are of two distinct types, the larger being shaped like a guinea egg, having a rather thick shell, and of doubtful merit. The other, known as the heartnut, is small as a rule, distinctly heartshaped, and easily opened with a knife by splitting the shell in half. A number of varieties are available through nurserymen.
Between these two distinct types of Japanese walnut there are numerous intermediate forms hard to classify but invariably less desirable than heartnuts. There are also numerous offspring of marked vigor, producing nuts distinctly butternut-like in form but having even thicker shells. These last do not commend themselves for any purpose other than that of genetic use.