Ulmus davidiana var. japonica 'Validation'

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Ulmus davidiana var. japonica 'Validation'
Variety Ulmus davidiana var. japonica
Cultivar 'Validation'
OriginMorton Arboretum, Illinois, US

The Japanese Elm cultivar Ulmus davidianavar.japonica 'Validation' is a selection made by Kunso Kim and Bethany Brown of the Morton Arboretum released in 2011; propagation is by grafting onto Siberian Elm Ulmus pumila rootstocks. [1]

Contents

Description

'Validation' is a vase-shaped tree, the trunk bark smooth and gray. The current year's twigs are light green, contrasting with the previous year's, which are greenish brown. [1]

Pests and diseases

Not known.

Cultivation

The tree is very rare in cultivation beyond the Morton Arboretum.

Accessions

North America
Europe

Related Research Articles

<i>Ulmus davidiana <span style="font-style:normal;">var.</span> japonica</i> Variety of tree

Ulmus davidiana var. japonica, the Japanese elm, is one of the larger and more graceful Asiatic elms, endemic to much of continental northeast Asia and Japan, where it grows in swamp forest on young alluvial soils, although much of this habitat has now been lost to intensive rice cultivation.

<i>Ulmus bergmanniana</i> Species of tree

Ulmus bergmannianaC.K.Schneid., commonly known as Bergmann's elm, is a deciduous tree found across much of China in forests at elevations of 1500–3000 m.

<i>Ulmus castaneifolia</i> Species of tree

Ulmus castaneifoliaHemsley, the chestnut-leafed elm or multinerved elm, is a small deciduous tree found across much of China in broadleaved forests at elevations of 500–1,600 metres (1,600–5,200 ft).

<i>Ulmus elongata</i> Species of tree

Ulmus elongataL. K. Fu & C. S. Ding , also known as the long raceme elm in the US, is a deciduous tree endemic to broadleaf forests in the eastern provinces of China.

<i>Ulmus lamellosa</i> Species of tree

Ulmus lamellosa, commonly called the Hebei elm, is a small deciduous tree native to four Chinese provinces, Hebei, Henan, Nei Mongol, and Shanxi, to the west and south of Beijing.

<i>Ulmus microcarpa</i> Species of tree

Ulmus microcarpa was named and first described by the Chinese botanist L. K. Fu, who discovered the tree in the Chayu broad-leaved forests of south-eastern Xizang at altitudes of around 2800 m during the 1973 Qinghai - Tibet Expedition. Unlike the majority of Tibet, the Chayu region has a subtropical highland climate featuring warm, wet, summers and mild, dry, winters. Commonly known as the Tibetan Elm, the tree was introduced to the United States in 2006, and the UK in 2013; it remains one of the rarest species of elm in cultivation.

<i>Ulmus prunifolia</i> Species of tree

Ulmus prunifoliaW. C. Cheng & L. K. Fu, the cherry-leafed elm, is a deciduous tree endemic only to the province of Hubei in central eastern China, where it is found at elevations of 1000–1500 m.

<i>Ulmus chenmoui</i> Species of tree

Ulmus chenmouiW. C. Cheng, commonly known as the Chenmou, or Langya Mountain elm, is a small deciduous tree from the more temperate provinces of Anhui and Jiangsu in eastern China, where it is found at elevations below 200 m on the Langya Shan and Baohua Shan mountains. The tree was unknown in the West until 1979, when seeds were sent from Beijing to the De Dorschkamp research institute at Wageningen in the Netherlands.

<i>Ulmus davidiana</i> Species of tree

Ulmus davidianaPlanch., the David, or Father David, elm, is a small deciduous tree widely distributed across China, Mongolia, Korea, Siberia, and Japan, where it is found in wetlands along streams at elevations of 2000–2300 m (6,500–7,500 ft). The tree was first described in 1873 from the hills north of Beijing, China.

<i>Ulmus szechuanica</i> Species of tree

Ulmus szechuanicaFang, known as the Szechuan (Sichuan), or red-fruited, elm, is a small to medium deciduous Chinese tree found along the Yangtze river through the provinces of Sichuan, Jiangxi, Anhui, and Jiangsu.

<i>Ulmus</i> Morton = <span class="trade_designation" style="font-variant:small-caps; margin-left: 0.05em;">Accolade</span> Elm cultivar

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.

<i>Ulmus</i> Morton Glossy = <span class="trade_designation" style="font-variant:small-caps; margin-left: 0.05em;">Triumph</span> Elm cultivar

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.

Ulmus 'Morton Plainsman' is a hybrid cultivar raised by the Morton Arboretum from a crossing of Siberian Elm and a Japanese Elm grown from openly pollinated seed donated by the Agriculture Canada Research Station at Morden, Manitoba. Tested in the US National Elm Trial coordinated by Colorado State University, Vanguard averaged a survival rate of 78% after 10 years.

<i>Ulmus</i> Morton Red Tip = <span class="trade_designation" style="font-variant:small-caps; margin-left: 0.05em;">Danada Charm</span> Elm cultivar

Ulmus 'Morton Red Tip' is a hybrid cultivar raised by the Morton Arboretum from an open pollination of Accolade. The tree has occasionally been reported as a hybrid of Accolade with the Siberian Elm Ulmus pumila, an error probably owing to the commercial propagation of the tree by grafting onto U. pumila rootstocks. Tested in the US National Elm Trial coordinated by Colorado State University, Danada Charm averaged a survival rate of 77.5% after 10 years.

<i>Ulmus</i> Morton Stalwart = <span class="trade_designation" style="font-variant:small-caps; margin-left: 0.05em;">Commendation</span> Elm cultivar

Ulmus 'Morton Stalwart', is a Morton Arboretum hybrid cultivar arising from a controlled crossing of Accolade with the hybrid of a Field Elm U. minor from eastern Russia and a Siberian Elm U. pumila. Tested in the US National Elm Trial coordinated by Colorado State University, Commendation averaged a survival rate of 85% after 10 years.

The Siberian elm cultivar Ulmus pumila 'Green King' was once believed to have been derived from a crossing of the Siberian Elm Ulmus pumila with the American Red Elm Ulmus rubra. However, it is now apparent the tree originated as a sport of U. pumila in 1939 at the Neosho Nurseries, Neosho, Missouri.

<i>Ulmus minor</i> Christine Buisman Elm cultivar

The Field Elm cultivar Ulmus minor 'Christine Buisman' was the first cultivar released by the Dutch elm breeding programme, initiated in response to the less virulent form of Dutch elm disease (DED), Ophiostoma ulmi, which afflicted Europe's elms after the First World War. 'Christine Buisman' was selected from a batch of 390 seedlings grown from seed collected in the Parque de la Quinta de la Fuente del Berro, Madrid, by Mrs Van Eeghen, a friend of elm researcher Johanna Westerdijk, in 1929 and named for the elm disease researcher Christine Buisman. Originally identified as Ulmus foliacea, it was later treated as Ulmus × hollandica by Melville. However, more recent research in Belgium using DNA markers has reaffirmed 'Christine Buisman' as a clone of U. minor.

<i>Ulmus</i> × <i>hollandica</i> Klemmer Elm cultivar

Ulmus × hollandica 'Klemmer', or Flanders Elm, is probably one of a number of hybrids arising from the crossing of Wych Elm with a variety of Field Elm, making it a variety of Ulmus × hollandica. Originating in the Bruges area, it was described by Gillekens in 1891 as l'orme champêtre des Flandres in a paper which noted its local name, klemmer, and its rapid growth in an 1878–91 trial. Kew, Henry (1913), and Krüssmann (1976) listed it as an Ulmus × hollandica cultivar, though Henry noted its "similarity in some respects" to field elm Ulmus minor, while Green went as far as to regard it as "possibly U. carpinifolia" (:minor).

<i>Ulmus laciniata <span style="font-style:normal;">var.</span> nikkoensis</i> Variety of tree

Ulmus laciniata var. nikkoensisRehder, the Nikko elm, was discovered as a seedling near Lake Chūzenji, near Nikkō, Japan, and obtained by the Arnold Arboretum in 1905. The taxonomy of the tree remains a matter of contention, and has been considered possibly a hybrid of U. laciniata and U. davidiana var. japonica. However, in crossability experiments at the Arnold Arboretum in the 1970s, U. laciniata, a protogynous species, was found to be incompatible with U. davidiana var. japonica, which is protandrous.

<i>Ulmus parvifolia</i> Species of tree

Ulmus parvifolia, commonly known as the Chinese elm or lacebark elm, is a species native to eastern Asia, including mainland China, Taiwan, Japan, North Korea, South Korea and Vietnam. It has been described as "one of the most splendid elms, having the poise of a graceful Nothofagus".

References

  1. 1 2 Morton Arboretum plant database, 2015.