Type H—A Siamese twin form occurring very rarely on the same
trees as other normal forms (Fig. 6h).
Type A was the commonest form of nut found in the Onondaga County area. It roughly exceeded Types B, D and E by a 2:1 ratio. Type C exceeded Types B, D and E with a ratio of about 7:5 in frequency of occurrence. Types B and D were the two most easily cracked nut forms when using a hammer and anvil for a cracking device. It should be noted at this time that all of the abnormal fruit types were found in conjunction with normal fruit types. Thus, one individual tree used as a collection might produce both a normal nut type (A, B, C, D or E) and an abnormal nut type (F, G or H). Occasionally a few nuts in a collection from one tree might be classed as a second normal type. This was rare however (5 cases) and only occurred in "borderline trees" which were then classified and recorded as per the dominant nut type for the tree. It should be noted here that the nut type did not vary from year to year for the trees examined. Also the frequency of nut crops varied considerably; less than 1/4 of the sample trees produced nuts each year. Most of the trees produced crops in alternate years, and a very few have not fruited in the third year following a heavy nut crop.
The 158 trees examined provided the following distribution by fruit types:
———————-+—————————+————————————————
| Number of | Number of abnormal types found
Fruit Type | Individual Trees | in conjunction with
| | normal types
—————-+—-+—————————+————————————————
| | | F G H
—————-+—-+—————————+————————————————
Normal | A | 54 | 5 2 1
| B | 23 | 2 1
| C | 36 | 1 2
| D | 21 | 7 1
| E | 24 | 4 1
—————-|—-+—————————+————————————————
| | 158 collections |
—————-+—-+—————————+————————————————
Abnormal | F | 15 | 15
| G | 8 | 8
| H | 4 | 4
———————-+—————————+————————————————
27 collections
Shell color of the nuts varied between a brownish white and a pinkish white color when fully dried. From the trees used as a sample, there were 14 which might be classed in the brownish white categories, and the remainder (144) as pinkish white or creamy white. Types B and C were the ones which most frequently were found with the brownish white nutshell color. Type A was typically pinkish or creamy white in color.
Nutshell thickness varied somewhat. In all but 2 cases, the nuts were too hard to crack with the teeth. The thin-shelled ones are comparatively thin only, being about like paper-shelled pecans with the shell thinnest on the sides of the nut. It is not suggested that these two thin-shelled nuts be exploited as paper-shelled shagbarks since they are poorly formed nuts and of small size. One of the two trees might be a hybrid since it does not have a ciliate leaflet margin although the buds, bark and leaves are typical of shagbark hickory. The minimum shell thickness observed for the side of the nut was 1/2 a millimeter (0.5 mm.) and the thickest was 2.0 millimeters. As previously stated, nut types B and D (the elliptical and obovate nut forms) were the easiest to crack. Nut type A was the most difficult and had generally the thickest shell.
The seed coat color range was from a light tan to a bronze color. The seed itself was in all cases sweet although certain of the nuts had a more pleasing taste than others. The nuts eventually became rancid though 3 years of storage in a heated room did not cause the bulk of the test samples to change in flavor. This is unlike the pecan which, stored in the same room with the hickory nuts, became rancid by the following year after collection.
Summary of Observations
The following observations concerning shagbark hickory may be made from this study:
(1) The buds of shagbark fall into 2 classes based on bud shape, (1) globose-ovate and (2) elliptical, the latter being the largest bud as a rule.
(2) The buds of shagbark fall into 2 classes based upon the length of the attenuated apex of the outer bud scales. The elliptical form of bud consistently had the longest drawn out apex.