Ash
Green ash (Fraxinus pennsylvanica)
White ash (Fraxinus americana)
Ash trees make up a large part of our urban forest. They are not native to Colorado and are not well adapted to our dry climate. These trees are susceptible to invasive pests such as Emerald Ash Borer.
| The twigs have a bud at their end. The leaves form a 'D' shaped scar. Photo: T. Davis Sydnor, The Ohio State University, Bugwood.org | |
| Single seeds form in a 1to 2 inch long winged pod (samara). Photo: Whitney Cranshaw, Colorado State University, Bugwood.org | |
| Leaves are compound with 5 to 9 leaflets arranged opposite. Each compound leaf has a terminal leaflet. Leaf edges are smooth. Photo: JCISM | |
| Branches are arranged opposite each other. Photo: JCISM | |
| Trunk to 2 feet in diameter. Mature bark is greyish with fissures in a diamond pattern. Photo: JCISM | |
| Trees are medium sized and can reach 40+ feet tall Photo: JCISM | |
RESOURCES | Colorado State Forest Service - Ash ID Minnesota Department of Natural Resources |