Ulmus × 'Frontier'
Native to (or naturalized in) Oregon:
- Broadleaf deciduous tree, upright-pyramidal, finally oval shape, about 40 ft tall and 30 ft wide (12 × 9 m), faster growing than male parent, U. parvifolia. Leaves alternate, simple, reddish when young, variable shape, 6.5-11 cm long and 3-5 cm wide, tip acuminate to obtuse, base unequal, sometimes somewhat wedge-shaped (cuneate), margin serrate, upper glossy green; long-lasting red-purple color in fall. Rarely flowers, no seed production observed.
- Sun to partial shade. Reportedly tolerant of Elm Yellows, Dutch Elm Disease and urban conditions.
- Hardy to USDA Zone 5 This hybrid selection resulted from a controlled pollination of U. carpinifolia [U. minor] with U. parvifolia by A.M. Townsend in 1971 at the USDA station in Delaware, Ohio. Released by the USDA, US National Arboretum in 1990.
- Oregon State Univ. campus: northeast Furman Hall, near 15th St. and Jefferson Ave.