Height 40-50: Alphabetical list
Quercus Heritage® Q. robur x Q. macrocarpa 'Clemons' - Heritage® Hybrid Oak
Quercus Regal Prince® Q. robur var. fastigiata x Q. bicolor 'Long' - Regal Prince® Hybrid Oak
Nyssa sylvatica - Blackgum, Black Tupelo
Quercus muehlenbergii - Chinkapin Oak
Quercus suber - Cork Oak
Quercus Kindred Spirit® Q. robur var. fastigiata x Q. bicolor 'Nadler' - Kindred Spirit® Hybrid Oak
Quercus Forest Knight® Q. robur x Q. alba 'Tabor' - Forest Knight® Hybrid Oak
Quercus macrocarpa (North Dakota source) - Bur Oak (North Dakota)