diamond willow

noun

1. a small willow tree or shrub, Salix bebbiana, of northern North America, having a gray bark often with diamond-shaped furrows caused by fungi.
2. the slender stems of this tree, often carved into furniture, walking sticks, and other decorative objects.

noun

1. Canadian wood that may come from any species of willow and has a diamond pattern in the grain, used for making walking sticks, table lamps, etc