Magnolia acuminata, commonly called the cucumber tree (often spelled as a single word 'cucumbertree'), cucumber magnolia or blue magnolia, is one of the largest magnolias, and one of the cold-hardiest. It is a large forest tree of the Eastern United States and Southern Ontario in Canada. It is a tree that tends to occur singly as scattered specimens, rather than in groves.The cucumber tree is native primarily within the Appalachian belt, including the Allegheny Plateau and Cumberland Plateau, up ...