I'm having a difficult time identifying this woody plant, and help would be greatly appreciated. I find them in southeast Michigan and northwest Ohio in mesic hardwood forests. When I notice them they're usually single shoots 2-4 feet in height, but today I found one that had grown to a small tree.
Leaves are alternate, simple, entire, oval, blunt on both ends, somewhat thickened and glabrous, tend to curl slightly along the margins.
Young stems are reddish brown with prominent lenticels and large terminal buds.
Older stems are gray with white warts, usually flattened horizontally.
I've never seen one with flowers or fruit.
Looks like Elaeagnus sp. - probably Autumn Olive. Invasive pest species, probably not flowering because of shadiness of site - but flowering/fruiting somewhere with birds distributing the seeds into those woods.