Image Citation: https://stwilliamsnursery.com/plantdirectory/pumpkin-ash/#sthash.TWiXo7l6.dpbs : St Williams Nursery & Ecology Center, St.Williams, ON, Canada
Leaves are opposite, pinnately compounded with blades 20-45 cm long, rachis 8/15 cm long, 7-9 leaflets ovate in shape, narrowly oblong or elliptic. The upper leaflet surface is dark green and hairless, the lower surface is hairy. In the fall, the foliage turns bronze to reddish purple before falling off to make way for the next years foliage. The bark is light gray with interlacing ridges. The swollen or "pumpkin" like trunk base is visibly apparent on some trees, especially those growing in deep swamp areas in the Southern growth range. The fruit is in the form of a samara 4-7 cm long and up to 14 mm broad. The fruit range in shape from narrowly linear to elliptic, with a wing arising from the base of the seed body. The fruit matures in early Autumn.
Best suited for hardiness zones 5-9, Pumpkin Ash prefers moist to slightly dry soil. It grows well in deep, loamy soil and swamp areas. Birds and small mammals feed readily on the seeds produced by this tree. It also provides cover and habitat for birds and other wildlife. The larvae of the Emerald Ash Borer feed destructively and can kill this species. Flies and caterpillars also will feed on the foliage.
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