This unique tree is characterized by its wide-spreading, horizontal branches, making it an excellent choice for use as a shade tree. Ulmus glabra ‘Horizontalis’ is hardy and can withstand wind and drought conditions, adding to its overall resilience. The branches of Ulmus glabra ‘Horizontalis’ can be pruned to keep the size in check, making it a versatile addition to any landscape. Ulmus glabra ‘Horizontalis’ is also known for turning yellow in the autumn season, which further adds to its aesthetic value. Ulmus glabra is deciduous and native to most of Europe. Learn more about Ulmus glabra. Ulmus glabra ‘Horizontalis’ originated in 1816 at a nursery in Perth, Australia but was first distributed by James Booth & Son in Hamburg, Germany.