Fraxinus oxycarpa - Image of a leafy shoot in summer. Fraxinus anomala - Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology. Fraxinus nigra - Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology. Fraxinus pennsylvanica - Describes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology. Fraxigen - Project to strengthen the scientific basis for the sustainable conservation and regeneration of European Fraxinus populations, through a fuller understanding of the biological and ecological processes which have shaped them. Green Ash: Fraxinus pennsylvanica - Description and images of twigs, leaves, flowers, fruit, bark and form. Black Ash: Fraxinus nigra - Description and images of twigs, leaves, fruit, bark and form. Blue Ash: Fraxinus quadrangulata - Description and images of twigs, leaves, fruit, bark and form. Fraxinus caroliniana: Carolina Ash - Photographs and information on the leaf, flower, fruit, twig, bark and form. Fraxinus latifolia: Oregon Ash - Information and photographs of the leaf, flower, fruit, twig, bark and form. Fraxinus profunda: Pumpkin Ash - Tree identification fact sheet with photos of the leaf, flower, fruit, twig, bark and form. Fraxinus - Profiles of all US species of ash.