White willow and crack willow
The pith of the twigs includes air areas. The fallen leaves are alternative, odd-pinnate, the biggest leaflets situated in the centre. The black walnut was introduced into Europe in 1629. It is cultivated there as a woodland tree for its top quality wood. The timber is utilized to make furnishings as well as rifle supplies, and also oil is pressed from the seeds. It takes place in mixed, broad- leaved woods, alongside rivers and also in hillside country, on deep, productive soils, obtaining elevations of up to 30 metres. The bark is grey, split by shallower crevices than those of the black walnut. The branches as well as buds are grey, sticky-pubescent, and also the pith of the twigs consists of air areas. Open-grown trees have a brief trunk and spreading crown. Under excellent problems it can attain 30 metres in elevation. As in all walnuts the pith of the twigs forms plates and also dividers with air rooms in between.