CHAPTER XVIII
A GROUP OF MEAT AND BUTTER TREES— THE OTHER WALNUTS
In the preceding chapters I have given much space to presenting facts about two species of walnuts and the philosophy of the subject in general. In brief this is—(1) Find the best existing strains, and we have the basis of a good industry now. (2) Breed better strains by crossing and hybridizing, and we have the basis of a better industry.
This philosophy is applicable in varying degrees to each of the other species of walnuts which are as follows:
(1) Butternut, juglans cinera.
(2) California walnut, juglans californica.
(3) Texas walnut, juglans rupestris.
(4) Arizona walnut, juglans major.
(5) Chinese walnut, juglans regia var, sinensis.
(6) Siberian walnut, juglans mandshurica.
(7) Japanese walnut, juglans sieboldiana, var, cordiformis, sometimes called "heart nut."
The space limitations of this book prohibit full discussion of these several species,' but I wish to emphasize a few points of especial significance.
The butternut (number one above) grows in colder climate®* than the black walnut, ranging from James Bay to
1¥For a fuller discussion of various species see Nut Growing, by Robert T. Morris. Macmillan. There is of course always Sargent's Silva, for an exhaustive presentation of questions of variety.
21922 Proceedings of Northern Nut Growers' Association, p. 72. J. A. Neilson. Professor Horticulture. Port Hope. Ontario, says, "The butternut is much hardier than the black walnut and has a much wider distribution
in Canada. It occurs throughout New Brunswick, in Quebec, along the St. Lawrence basin, and in Ontario from the shore of Lakes Erie and Ontario
