Answer: Henry Lauder's Walking Stick (Corylus avellana "Contorta") is grafted onto a different rootstock. It's usually grafted high (about 4' high). If this graft is damaged or if it dies, the branches your plant produces will be from the rootstock (a filbert tree), with standard branching patterns, not the twisted curving branches you expect. There's nothing you can do if the graft is damaged other than replace the tree. Before doing that, though, cut off the branches that do not curve and try to get in to inspect the graft. You want new growth from the graft or above, not from below the graft. (You might take the upright, straight branches as a sign that your marriage will be without the usual twists and curls.....)
Best wishes with your contorted filbert.
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