Further studies will be made to see if under optimum conditions of handling after proper harvesting and curing the record of cracking quality cannot be improved upon.
Hickories
According to Alfred Rehder, of Harvard, in the Standard Cyclopedia of Horticulture, six species of hickory are indigenous to that region east of the Rocky Mountains here discussed under the term of the northernmost nut zone. These are the shagbark, the shellbark, the sweet hickory, the pignut, the mockernut and the bitternut. The shagbark hickory, Hicoria ovata, and the sweet hickory, H. ovalis, are the principal ones among this group offering promise as sources of varieties fit for cultivation in this zone. The former is well known as a rich-land species, having shaggy bark and a more or less sharply angled sweet nut; the latter, often called pignut, has recently been listed as "sweet hickory" to distinguish it from H. glabra, also called pignut, yet which is sometimes better. The sweet hickory is less exacting in soil requirements than the shagbark, although often nearly or quite as good a nut, popular prejudice notwithstanding. When shelled the kernels can be distinguished only with difficulty.
Of the other hickories indigenous to this zone, all are omitted from the discussion for definite reasons, chief of which is the fact that few or no seedlings of promise have been found. The shellbark, H. laciniosa, which is much like the shagbark in many respects, occurs in this zone sparingly and only in the southernmost part. Nuts of this species, while very large, are thick-shelled and commonly more or less objectionable because of the frequency with which the kernels are imperfectly developed or entirely wanting. The pignut hickory, H. glabra, already mentioned, is omitted from further discussion because of being no better than the sweet hickory in any known respect, and because of the frequent bitterness of its kernel. The mockernut, H. alba, while indigenous practically everywhere that any other hickory grows, and producing a sweet, agreeable kernel, has too thick a shell to justify particular attention at this time. The bitternut hickory, H. cordiformis, is rarely palatable. The tree makes an attractive ornamental, but is relatively unimportant in so far as timber production is concerned.
Intermediate forms of hickory and hybrids originated from chance crosses under purely natural conditions are fairly common. Quite a good many belonging to one or the other of these groups have been brought to light during the last two decades, largely as a result of discovery by the Northern Nut Growers Association. Several of these will be discussed in alphabetical order along with varieties of pure species.
ANTHONY—The Anthony shagbark originated with a seedling tree discovered by Mr. A. B. Anthony, R. F. D. 6, Sterling, Whiteside County, Ill. It appears to be a particularly choice variety, and as the latitude of Sterling is practically the same as that of Chicago, it might do very well in the lower portion of the northernmost zone. In a cracking test of the 1932 crop the yield of quarters was 41.66, that of small pieces 0.60, making a total of 42.26 per cent. The nuts were large, averaging 74 per pound; attractive in appearance, clean, and of nearly white color. The cracking quality was good, the kernel plump, bright, rich in quality and medium sweet in flavor, but not being equal to some others in this last respect. This is believed to be one of the choicest hickory nuts yet brought to light.
CEDAR RAPIDS—This shagbark is from Cedar Rapids, Linn County, Iowa, where the latitude is about 42 degrees north, or about the same as that of Chicago, Ill., Tecumseh, Mich., and the boundary line between Pennsylvania and New York. Like Anthony (of Sterling, Ill.) the merit of this variety is believed such as to justify its trial planting in the southern portion of the northernmost zone.
The Cedar Rapids shagbark was discovered and brought to light by the late S. W. Snyder, senior member of Snyder Bros., Inc., nurserymen at Center Point, Iowa. The exact or even approximate year of discovery and first propagation is not known to the writer, but a remark made by Mr. Snyder during the 1930 convention, and passed on to him by Dr. Deming, would indicate that grafts were made as early as 1914. It was, "a Cedar Rapids shagbark grafted on a hickory (probably meaning shagbark), bore in its third year and has borne every year since, but the same variety grafted 16 years ago on a bitternut has not borne." In various comments made by Mr. Snyder from time to time, especially in connection with the Iowa meetings of the State Horticultural Society and of the Mid-West Horticultural Exposition, he continued to rate this as one of the best varieties within his acquaintance. There are a number of grafted trees of this variety in various parts of the country, but very few yet in bearing. The department at Washington has had no opportunity to test the nuts in detail.
(There is also a variety of bitternut from Iowa known as Cedar Rapids, but the two are quite unlike and should not be confused.)
COMINS—The original tree of the Comins shagbark hickory, awarded eighth prize in the 1929 contest, is owned by Mrs. Nancy E. Comins, Amherst, Hampshire County, Mass. This variety is probably worthy of further investigation, although specimens of the 1929 crop examined at Washington did not appear to as good advantage as did many others.