|Common name: Slippery elm, red elm.
Voucher: Kostadinov 083, (URV)
Brief description: A medium-sized to large tree with smooth gray bark. Leaves are large, oblong to obovate, thick and stiff, very rough above (distinguishing feature from U. americana), oblique at base, simple, alternate, entire, pinnately veined, margins doubly serrate-toothed. Flowers are small and inconspicuous, perfect, in fascicles, subsessile. Fruits are a suborbicular samara, pubescent over the seeds.
Campus data: Infrequent in the wild on campus, mostly shrubby.