This list of botanical gardens and arboretums in Oregon is intended to include all significant botanical gardens and arboretums in the U.S. state of Oregon. [1] [2] [3]
This list of botanical gardens and arboretums in Oregon is intended to include all significant botanical gardens and arboretums in the U.S. state of Oregon. [1] [2] [3]
An arboretum in a general sense is a botanical collection composed exclusively of trees. More commonly a modern arboretum is a botanical garden containing living collections of woody plants and is intended at least in part for scientific study.
The Hoyt Arboretum is located atop a ridge in the west hills of Portland, Oregon, United States. The arboretum is located two miles (3 km) west of downtown Portland within Washington Park, and close to the Oregon Zoo, and the International Rose Test Garden. The Arboretum is open to the public and accessible at several points from Washington Park or from the Wildwood Trail from Forest Park.
Ulmus 'Morton' is an elm cultivar cloned from a putative intraspecific hybrid planted at the Morton Arboretum in 1924, which itself originated as seed collected from a tree at the Arnold Arboretum in Massachusetts. Although this tree was originally identified as Ulmus crassifolia, it is now believed to have been a hybrid of the Japanese elm and Wilson's elm. Accolade has proven to be the most successful cultivar tested in the US National Elm Trial, averaging a survival rate of 92.5% overall.
Ulmus 'Morton Glossy' is a hybrid cultivar raised by the Morton Arboretum, Illinois. Originally named 'Charisma' until it was realized that name had already been registered for another plant, the tree was derived from a crossing of two other hybrid cultivars grown at the Morton: Accolade and Vanguard. Tested in the US National Elm Trial coordinated by Colorado State University, Triumph averaged a survival rate of 86% after 10 years. Triumph was introduced to the UK in 2006 by the Frank P. Matthews nursery in Worcestershire.
The Field Elm cultivar Ulmus minor 'Atinia Variegata', the Variegated-leaved common English Elm, formerly known as U. procera 'Argenteo-Variegata' and described by Weston (1770) as U. campestris argenteo-variegata, is believed to have originated in England in the seventeenth century and to have been cultivated since the eighteenth. The Oxford botanist Robert Plot mentioned in a 1677 Flora a variegated elm in Dorset, where English Elm is the common field elm. Elwes and Henry (1913) had no doubt that the cultivar was of English origin, "as it agrees with the English Elm in all its essential characters". At the Dominion Arboretum, Ottawa, the tree was listed as U. procera 'Marginata', as the variegation is sometimes most obvious on leaf-margins.
The Field Elm cultivar Ulmus minor 'Viminalis Aurea', probably a "golden" form of Ulmus minor 'Viminalis', was raised before 1866 by Egide Rosseels of Louvain, who was known to have supplied 'Viminalis'.
The Field Elm cultivar Ulmus minor 'Argenteo-Variegata' or simply 'Variegata', known in Australasia and North America as Silver Elm or Tartan Elm, is said to have been cultivated in France from 1772. Green noted that variegated forms of Field Elm "arise frequently, and several clones may have been known under this name". Dumont de Courset (1802) listed an U. campestris var. glabra variegata, Loudon (1838) an U. nitens var. variegata, and Wesmael (1863) an U. campestris var. nuda microphylla variegata.
The Chinese Elm cultivar Ulmus parvifolia 'Hokkaido' is an older cultivar of Japanese origin.
The possible elm cultivar Ulmus 'Jalaica' hails from the Baltic states. Living specimens are grown in the arboretum at the National Botanic Garden of Latvia, Salaspils, introduced in 1998 from the Tallinn Botanic Garden and the plantarium OPU Tallinn, Estonia. It was assumed the word 'Jalaica' was the name given the cultivar, but it has since emerged that the word simply means 'Elm' in Estonian, and the trees donated may not in fact be cultivars, although of rather unusual appearance.
