The green ash or red ash, is a species of ash native to eastern and central North America.
It is a medium-sized deciduous tree reaching 12–25 meters (39–82 feet) (rarely to 45 m or 148 ft) tall with a trunk up to 60 centimeters (24 inches) in diameter. The bark is smooth and gray on young trees, becoming thick and fissured with age.
The natural habitat of green ash is almost exclusively stream sides and bottomlands. The large seed crops provide food to many kinds of wildlife.
North American native ash tree species are used by North American frogs as a critical food source, as the leaves that fall from the trees are particularly suitable for tadpoles to feed upon in ponds (both temporary and permanent), large puddles, and other water sources.