DR. MacDANIELS: I have poison ivy under some of mine, but not for that purpose.
MR. McDANIEL: It grows under all good trees.
DR. MacDANIELS: The next paper is one which George Slate kind of foisted off on me. He came around and said he thought something more should be said about the butternut and asked if I would get out a report and discuss the standards for evaluation. That is the reason for this paper, which I will read. It will take only about ten minutes.
How About the Butternut?
DR. L. H. MacDANIELS, Ithaca, New York
The purpose in presenting this paper is to summarize what is known about the butternut in the light of my own experience, and to find out from you in discussion what additional facts are available and what some of the problems in the culture of butternuts may be. A good summary by S. H. Graham is to be found in the 34th Annual report of the Northern Nut Growers Association, and short reports appear elsewhere. In general, however, judging from the proceedings of this Association, the butternut has not received much attention through the years. The lack of interest in the butternut indicates unsatisfactory experience with this nut on the part of those who have tried to grow and use it. An analysis of its good and bad characteristics is in order.
Of all the species of nuts with which the Association is concerned, the butternut is the most hardy and the most likely to succeed on poor soil. In general, the trees are easy to transplant, are early bearing, sometimes within two years from the graft, and are easy to grow. The flavor of the butternut is very distinctive and palatable, and usually much more flavorful than similar nuts derived from the Japanese butternut and the heartnut. Some people consider the butternut flavor the best of all nuts.
On the other hand, the butternut has a reputation for being short lived because of susceptibility to various diseases. The seedling trees which are usually sold are slow in bearing. The common wild nuts are hard to crack with a hammer, and the better named varieties are not well known or widely grown. The trees also have a reputation for being difficult to propagate. Of these faults, probably the difficulty of propagation and cracking are the most important in restricting its use.
Botanically the butternut (Juglans cinerea) belongs to a group of species within the genus Juglans that bears its fruit in long clusters or racemes, as contrasted with the walnut group which bears nuts singly or in clusters of two or three. The butternuts also have the fruit and leaves covered with sticky hairs instead of being smooth. The group is further characterized by having a cushion of hairs above the leaf scars and pointed terminal buds on the twigs. Other species within the group are the Japanese butternut J. Sieboldiana, its variety cordiformis, the heartnut, and several less well known species including J. mandshurica and J. cathayensis, both native to central Asia. These closely related species apparently hybridize with each other, but accurate information as to the nature and extent of such hybridization is not available.
The natural geographical range of the butternut covers a broad area of Northeastern North America, extending from New Brunswick southward to the mountains of Georgia and westward to Western Ontario, Dakota, and Arkansas. In this range it is most frequent in calcareous soils, reaching its best development in rich woodland, but persisting on poorer upland soils also. It thus has the most northern range of our native nut species, along with the Pignut, Carya glabra, and one species of hazelnut, Corylus rostrata. The other related species are of variable and uncertain hardiness and are not reliable in this northern range.