Magnolia acuminata (commonly called the cucumber tree, cucumber magnolia or blue magnolia), late October. Native to eastern North America. The flowers are typically small, yellow-green, and borne high in the tree in April through June. The leaves are pointed at the tip and provide it with its name - 'acuminate' means tapering to a fine point. The name Cucumber Tree refers to the unripe fruit, which is green and often shaped like a small cucumber.