WHAT: Contorted filbert, also known as Harry Lauder’s walking stick or corylus avellana contorta, is a deciduous tree with spiraled, mangled branches that provide striking winter interest in Northwest ...

Last month, this column focused on the desirable characteristics of Christmas trees, one of which is good needle retention.

This contorted filbert cultivar is often grafted onto the rootstock of the straight species, meaning suckers from the roots will not show traits of the cultivar. In addition to being contorted, this ...

Along with spring comes life back into the garden. One of my favorite early spring shrubs is actually a small grafted tree known as Henry Lauders Walking Stick or Corylus avellana ‘Contorta’. During ...

The investigation of isozymes peroxidases of the genus Corylus L. was performed by disk electrophoresis on polyacrylamide gel. The results showed that filbert peroxydase system was highly polymorphic, ...