Flower Notes:
Purple (Bisexual; appear in April or May; not ornamentally important)
Foliage Notes:
Green (Summer; lustrous dark green); Yellow (Fall; pale yellow)
Stem Notes:
stout, corky-winged, glabrous at maturity
Fruit Notes:
Brown (Pendulous samaras in the fall, often persisting into the winter)
Soil Notes:
Tolerant of different soils, as long as they are well-drained
Diagnostic Characteristics:
Leaves are opposite, pinnately compound, 7-14" long, with 7-11 sharply serrate leaflets (2-5" long). The specific epithet name, quadrangulata, refers to the distinctly stout, four-sided and corky-winged twigs. Bark on more mature Blue Ash trees is easily distinguishable from other ashes, as it is irregularly plated and scaly.