Green ash :
Fraxinus pennsylvanica var. lanceolata.
APA Citation
United States. Forest Service. Northeastern Area, S. and Private Forestry. (1980). Green ash: Fraxinus pennsylvanica var. lanceolata. Broomall, Pa.: Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station.
MLA Citation
United States. Forest Service. Northeastern Area, State and Private Forestry. Green Ash: Fraxinus Pennsylvanica Var. Lanceolata. Broomall, Pa.: Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1980.
Warning: These citations may not always be complete (especially for serials).