acorn. In spring, a single oak tree produces both male flowers (in the form of catkins) and small female flowers. The fruit is a nut called an acorn or oak nut borne in a cup-like structure known as a cupule; each acorn contains one seed (rarely two or three) and takes 6–18 months to mature, depending on their species. read more
The fruit of the oak tree is an Acorn There is a saying "Mighty oaks from little acorns grow" meaning big things happen from small beginnings. read more
By the time it reaches 70 or 80 years of age, an oak tree produces thousands of acorns annually. Oak trees sometimes rest for a year after yielding a heavy crop, so a tree may not produce acorns every single year. Acorn Ripening. Acorns of the white oak are formed, mature and fall from the tree all in the same year. read more