Because
of this mixture of characteristics, the government experts had great
difficulty in identifying the variety, although the Ohio was well known
to them.
Another variety of black walnut, the Thomas, I have also known to be
influenced by the butternut stock on which it was grafted, when in 1938,
one of my trees bore black walnuts whose meat had lost its
characteristic flavor and assumed that of the butternut.
[Illustration: _A--Genuine original Ohio Black Walnut from parent tree_
_B--Nut produced by grafting Ohio on Butternut_]
I also liked to pick hazelnuts when I was a boy. These are probably the
least interesting among the wild nuts since they are usually small and
hard to crack. There is much variation in wild hazels, however, and many
people may recall them as being reasonably large. One of the two species
abundant in Minnesota, _Corylus cornuta_ or Beak hazel, has fine,
needle-like hairs on its husk which are sure to stick into one's fingers
disagreeably. When the husk is removed, _Corylus cornuta_ resembles a
small acorn. It does not produce in southern Minnesota and central
Wisconsin as well as the common hazel, _Corylus Americana_, does, nor is
its flavor as pleasing to most people.
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