The term 'willow for basket making' is referring to the use of OSIER, which is a type of willow tree that is commonly used in basket making. OSIER is a type of willow tree that has flexible branches and is often used for weaving baskets, furniture, and other items. The branches are usually harvested in the winter when they are still green and pliable. OSIER is an ideal material for basket making because it is strong, lightweight, and durable.