Ash trees (genus Fraxinus) grow in many parts of the world, including some regions of the Middle East. The flowering or manna ash (Fraxinus ornus) is one such tree. It grows from 4.6 to 15.2 meters (15 to 50 feet) tall and produces a sweet sap known as "manna."
Some Bible scholars believe that the "ash" tree mentioned in Isaiah 44:14 in the King James Version refers to the Aleppo pine. Although not true ash trees, some other desert plants like the prickly alhagi (Alhagi maurorum) and the manna tamarisk (Tamarix mannifera) produce sweet substances that may have been associated with biblical "manna."