Acer negundo L.
Family: Sapindaceae
ash-leaved maple, box elder
Acer negundo image
Merel R. Black  
Etymology: Acer: the classical Latin name for the maple
Plants: perennial tree up to 75' tall and up to 4' in diameter with the main trunk producing many small irregular branches; bark rough
Leaves: opposite, pinnately-divided into 3-5 (up to 9) leaflets; lance-like to oval or oblong, 4"-10" long, edges mostly with coarse, irregular teeth or lobes; end leaflet usually 3-lobed
Flowers: blooms April to May either before or when leaves open
Fruits: winged, paired fruit; fruit drawing
Habitat: moist; rich soil
Conservation Status: Native - potentially invasive