Coefficient of Conservatism:
Coefficient of Wetness:
B. S. Walters
Deciduous forests, usually on floodplains, occasionally on uplands.
As in F. nigra, the calyx is lacking (or early deciduous) and the fruit is strongly flattened, but the lateral leaflets have short petiolules. Besides the unique winged twigs, larger trees often have distinctive downturned lower branches that may persist even when dead on fully mature trees.
This species shows much resistance to the emerald ash borer, and trees are often damaged but recover or at least continue to survive. It has thus not shown the extreme decline in numbers of larger trees like all other ash in Michigan.