Ulmus minor 'Atinia'

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Ulmus minor 'Atinia'
Ulmus-minor-atinia-brighton-south-east-entrance-to-preston-park.jpg
English Elm, Brighton, 1992
Species Ulmus minor
Cultivar 'Atinia'
OriginItaly

The field elm (Ulmus minor) cultivar 'Atinia' , [1] commonly known as the English elm, formerly common elm and horse may, [2] and more lately the Atinian elm, [3] was, before the spread of Dutch elm disease, the most common field elm in central southern England, though not native there, and one of the largest and fastest-growing deciduous trees in Europe. R. H. Richens noted that elm populations exist in north-west Spain and northern Portugal, and on the Mediterranean coast of France that "closely resemble the English elm" and appear to be "trees of long standing" in those regions rather than recent introductions. [4] [5] Augustine Henry had earlier noted that the supposed English elms planted extensively in the Royal Park at Aranjuez from the late 16th century onwards, specimens said to have been introduced from England by Philip II [6] and "differing in no respects from the English elm in England", behaved as native trees in Spain. He suggested that the tree "may be a true native of Spain, indigenous in the alluvial plains of the great rivers, now almost completely deforested". [7]

Contents

Richens believed that English elm was a particular clone of the variable species Ulmus minor , referring to it as Ulmus minor var. vulgaris. [8] A 2004 survey of genetic diversity in Spain, Italy, and the UK confirmed that English elms are indeed genetically identical, clones of a single tree, said to be Columella's 'Atinian elm', [9] once widely used for training vines, and assumed to have been brought to the British Isles by Romans for that purpose. [10] Thus, despite its name, the origin of the tree is widely believed to be Atina, Lazio, in Italy, [9] [11] the home town of Columella, whence he imported it to his vineyards in Cadiz, [12] although the clone is no longer found in Atina and has not yet been identified further east. [13]

Max Coleman of the Royal Botanic Garden, Edinburgh writes: "The advent of DNA fingerprinting has shed considerable light on the question. A number of studies have now shown that the distinctive forms that Melville elevated to species and Richens lumped together as field elm are single clones, all genetically identical, that have been propagated by vegetative means such as cuttings or root suckers, as the flowers are completely sterile. This means that enigmatic British elms such as ... English elm have turned out to be single clones of field elm." [14] Most flora and field guides, however, do not list English elm as a form of U. minor, but rather as U. procera.

Synonyms (chronological)

Description

The tree often exceeded 40 m (about 130 ft) in height with a trunk less than 2 m (6.5 ft) in diameter at breast height (dbh). [23] The largest specimen ever recorded in England, at Forthampton Court, near Tewkesbury, was 46 m (151 ft) tall. [7] While the upper branches form a fan-shaped crown, heavy, more horizontal boughs low on the bole often give the tree a distinctive 'figure-of-eight' silhouette. The small, reddish-purple hermaphrodite apetalous flowers appear in early spring before the leaves. The samara is nearly circular. [24] [25] The leaves are dark green, almost orbicular, < 10 cm long, without the pronounced acuminate tip at the apex typical of the genus. [26] They flush a lighter green in April, about a month earlier than most field elms. Since the tree does not produce long shoots in the canopy, it does not develop the markedly pendulous habit of some field elms. The bark of old trees was described by Richens as "scaly rather than longitudinally grooved". [27] The bark of English elm suckers, like that of Dutch elm suckers and of some field elm, can be corky, but Dutch elm suckers may be distinguished from English by their straighter, stouter twigs, bolder 'herringbone' pattern, and later flushing.

The tree is both female- and male-sterile, natural regeneration being entirely by root suckers. [8] [28] Seed production in England was often unknown in any case. [29] By the late 19th century, urban specimens in Britain were often grafted on to wych elm rootstock to eliminate suckering; Henry noted that this method of propagation seldom produced good specimens. [7]

Pests and diseases

Owing to its homogeneity, the tree has proven particularly susceptible to Dutch elm disease, but immature trees remain a common feature in the English countryside courtesy of the ability to sucker from roots. After about 20 years, these suckers, too, become infected by the fungus and killed back to ground level. English elm was the first elm to be genetically engineered to resist disease, at the University of Abertay Dundee. [30] It was an ideal subject for such an experiment, as its sterility meant no danger exists for its introgression into the countryside.

In the United States, English elm was found to be one of the most preferred elms for feeding by the Japanese beetle Popillia japonica . [31]

The leaves of the English elm in the UK are mined by Stigmella ulmivora .

Uses

English elms in hedgerow, Alfriston, East Sussex (1996) English elm in east sussex.jpg
English elms in hedgerow, Alfriston, East Sussex (1996)

... He liked to be alone, feeling his soul heavy with its own fate. He would sit for hours watching the elm trees standing in rows like giants, like warriors across the country. The Earl had told him that the Romans had brought these elms to Britain. And he seemed to see the spirit of the Romans in them still. Sitting there alone in the spring sunshine, in the solitude of the roof, he saw the glamour of this England of hedgerows and elm trees, and the labourers with slow horses slowly drilling the sod, crossing the brown furrow, and the chequer of fields away to the distance.

– From D. H. Lawrence , The Ladybird (1923). [32]

The English elm was once valued for many purposes, notably as water pipes from hollowed trunks, owing to its resistance to rot in saturated conditions. It is also very resilient to crushing damage, and these two properties led to its widespread use in the construction of jetties, timber piers, lock gates, etc. It was used to a degree in furniture manufacture, but not to the same extent as oak, because of its greater tendency to shrink, swell, and split, which also rendered it unsuitable as the major timber component in shipbuilding and building construction. The wood has a density around 560 kg/m3. [33]

However, English elm is chiefly remembered today for its aesthetic contribution to the English countryside. In 1913, Henry Elwes wrote, "Its true value as a landscape tree may be best estimated by looking down from an eminence in almost any part of the valley of the Thames, or of the Severn below Worcester, during the latter half of November, when the bright golden colour of the lines of elms in the hedgerows is one of the most striking scenes that England can produce". [7]

Cultivation

The introduction of the Atinian elm to Spain from Italy is recorded by the Roman agronomist Columella. [34] It has also been identified by Heybroek as the elm grown in the vineyards of the Valais, or Wallis, canton of Switzerland. [35] [36] [37] Although no record has been found of its introduction to Britain from Spain, [38] the tree has been long believed to have arrived with the Romans, a hypothesis supported by the discovery of pollen in an excavated Roman vineyard. Pliny, however, in his Natural History pointed out that the Atinian elm was not considered suitable for vineyards on account of its dense foliage. [39] [40] The tree was used as a source of leaf hay. [13] Elms said to be English Elm, and reputedly brought to Spain from England by Philip II, were planted extensively in the Royal Park at Aranjuez and the Retiro Park, Madrid, from the late 16th century onwards. [8] [41]

More than a thousand years after the departure of the Romans from Britain, English elms found far greater popularity, as the preferred tree for planting in the new hawthorn hedgerows appearing as a consequence of the Enclosure movement, which lasted from 1550 to 1850. In parts of the Severn Valley, the tree occurred at densities over 1000 per km2, so prolific as to have been known as the 'Worcester weed'. [42] In the eastern counties of England, however, hedgerows were usually planted with local field elm, or with suckering hybrids. [43] When elm became the tree of fashion in the 18th and 19th centuries, avenues and groves of English elm were often planted, among them the elm groves in The Backs, Cambridge. [44] Perhaps the most famous English Elm avenue was the double row in the Long Walk, Windsor Great Park, Berkshire, [45] planted in the 1680s [46] on the advice of John Evelyn, and described by Elwes as "one of the finest and most imposing avenues in the world". [47] The elms were felled in 1943. [48]

English elm was introduced into Ireland, [49] and as a consequence of Empire has been cultivated in eastern North America and widely in south-eastern Australia and New Zealand. It is still commonly found in Australia and New Zealand, where it is regarded at its best as a street or avenue tree. [50] [51] [52] Some old specimens labelled 'English elm' in Australia, however, have unplated, more vertically furrowed bark [53] [54] [55] and less rounded leaves than common English elm, [56] and appear to be a different clone. English elm was also planted as a street tree on the American West Coast, notably in St Helena, California, [57] and it has been planted in South Africa. [58]

Notable trees

Mature English elms are now only very rarely found in the UK beyond Brighton and Edinburgh. One large tree survives in Leicester in Cossington Street Recreation Ground. Several survive in Edinburgh (2015): one in Rosebank Cemetery (girth 3 m), one in Founders Avenue, Fettes College, and one in Inverleith Park (east avenue), while a majestic open-grown specimen (3 m) in Claremont Park, Leith Links, retains the dense, fan-vaulted crown iconic in this cultivar. An isolated mature English elm is in the cemetery at Dervaig, Isle of Mull, Scotland.

Some of the most significant remaining stands are to be found overseas, notably in Australia, where they line the streets of Melbourne, protected by geography and quarantine from disease. [59] [60] An avenue of 87 English Elms, planted around 1880, lines the entrance to the winery of All Saints Estate, Rutherglen, Victoria; [61] a double avenue of 400 English Elms, planted in 1897 and 1910–15, lines Royal Parade, Parkville, Melbourne. [62] [63] [64] Large free-standing English Elms in Tumut, New South Wales, [65] and Traralgon, Victoria, [66] show the 'un-English' growth-form of the tree in tropical latitudes. [67] However, many of the Australian trees, now over 100 years old, are succumbing to old age, and are being replaced with new trees raised by material from the older trees budded onto Wych Elm Ulmus glabra rootstock. [68] In New Zealand a "massive individual" stands at 36 Mt Albert Road, Auckland. [50] In the United States, several fine trees survive at Boston Common, Boston, and in New York City, [69] notably the Hangman's Elm in Washington Square Park. [70] A large old specimen, the Goshen Elm (bole-girth 236 in.) stands (2021) in Gaithersburg, Maryland. [71] [72] In Canada four 130-year English Elms, inoculated against disease, survive on the Back Campus field of the University of Toronto. [73] An English Elm planted c.1872 (girth 5.1 m) stands in Kungsparken, Malmö, Sweden. [74]

Brighton and the cordon sanitaire

Although the English elm population in Britain was almost entirely destroyed by Dutch elm disease, mature trees can still be found along the south coast Dutch Elm Disease Management Area in East Sussex. This cordon sanitaire, aided by the prevailing southwesterly onshore winds and the topographical niche formed by the South Downs, has saved many mature elms. Amongst these were possibly the world's oldest surviving English elms, known as the 'Preston Twins' in Preston Park, both with trunks exceeding 600 cm in circumference (2.0 m dbh), though the larger tree lost two limbs in August 2017 following high winds, [76] and was felled in December 2019 after succumbing to DED. [77] [78]

Cultivars

A small number of putative cultivars have been raised since the 18th and early 19th centuries, [79] three of which are now almost certainly lost to cultivation: 'Acutifolia', 'Atinia Pyramidalis', 'Atinia Variegata', 'Folia Aurea', 'Picturata'. Though usually listed as an English Elm cultivar, Ulmus 'Louis van Houtte' "cannot with any certainty be referred to as Ulmus procera [ = 'Atinia'] " (W. J. Bean). [23] In Sweden, U. × hollandica 'Purpurascens', though not a form of English Elm, is known as Ulmus procera 'Purpurea'. [80]

Hybrids, hybrid cultivars, and mutations

Crossability experiments conducted at the Arnold Arboretum in the 1970s apparently succeeded in hybridizing English elm with U. glabra and U. rubra, both also protogynous species. However, the same experiments also shewed English elm to be self-compatible, which in the light of its proven female-sterility, must cast doubt on the identity of the specimens used. [81] A similar doubt must hang over Henry's observation that the 'English elms' at Aranjuez (see Cultivation above) "produced every year fertile seed in great abundance", [82] seed said to have been taken "all over Europe", presumably in the hope that it would grow into trees like the royal elms of Spain. [83] Given that English elm is female-sterile, the Aranjuez elms either were not after all English elm, or by the time Henry collected seed from them, English elms there had been replaced by intermediates or by other kinds. At higher altitudes in Spain, Henry noted, such as in Madrid and Toledo, the 'English elm' did not set fertile seed. [84]

The 2004 study, which examined "eight individuals classified as English elm" collected in Lazio, Spain, and Britain, noted "slight differences among the Amplified fragment length polymorphism fingerprinting profiles of these eight samples, attributable to somatic mutations". [9] Since 'Atinia', though female infertile, is an efficient producer of pollen and should be capable of acting as a pollen parent; it is compatible with the 2004 findings that in addition to a core population of genetically virtually identical trees deriving from a single clone, intermediate forms of U. minor exist, of which that clone was the pollen parent. These might be popularly or even botanically regarded as 'English elm', though they would be genetically distinct from it, and in these, the female infertility could have gone. The "smooth-leaved form" of English elm mentioned by Richens (1983), [8] and the "northern and Irish form" seen by Oliver Rackham in Edinburgh and Dublin and said by him (1986) to have been introduced to New England, [85] are possible examples of 'Atinia' mutations or intermediates.

Ulmus × hollandica hybrid elms introduced to Australia from England are "commonly and erroneously referred to [in Australia] as 'English Elm' ". [86] Melbourne Botanic Gardens were able to raise seedlings from the "few" viable seeds of what was believed to be a "type" old English Elm in the collection, producing "highly variable" offspring. [87] "This seedling variation," wrote Roger Spencer (Horticultural Flora of South-Eastern Australia, 1995), "suggests one possible source of the variation to be found in these trees [so-called 'English elm' [53] [56] [55] ] in Australia." [87] The extent to which elms in Australia have been propagated by seed rather than by cloning is unclear, but Melville believed that there were Ulmus procera × Ulmus minor hybrids present in Victoria. [87] "Chance hybridisation," wrote Spencer, "has resulted in a mix of elms rather different from that in England". [88] Similarly, an old tree labelled U. procera in Dunedin Botanic Garden, New Zealand (2023), may be an elm from England, but it is not the English elm clone. [89]

In art and photography

The elms in the Suffolk landscape paintings and drawings of John Constable were not English elm, but "most probably East Anglian hybrid elms ... such as still grow in the same hedges" in Dedham Vale and East Bergholt, [90] while his Flatford Mill elms were U. minor. [91] Constable's Study of an elm tree (circa 1821) is, however, thought to depict the bole of an English elm with its bark "cracked into parched-earth patterns". [92] Among artists who depicted English Elms were Edward Seago [93] and James Duffield Harding. English elm features in oil paintings by contemporary artist David Shepherd, either as the main subject (Majestic elms ) or more often as the background to nostalgic evocations of farming scenes. [94]

Among classic photographs of English elm are those by Edward Step and Henry Irving in Wayside and Woodland Trees, A pocket guide to the British sylva (1904). [95]

Accessions

North America

Europe

Australasia

See also

Related Research Articles

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

Ulmus laevisPall., variously known as the European white elm, fluttering elm, spreading elm, stately elm and, in the United States, the Russian elm, is a large deciduous tree native to Europe, from France northeast to southern Finland, east beyond the Urals into Kyrgyzstan and Kazakhstan, and southeast to Bulgaria and the Crimea; there are also disjunct populations in the Caucasus and Spain, the latter now considered a relict population rather than an introduction by man, and possibly the origin of the European population. U. laevis is rare in the UK, although its random distribution, together with the absence of any record of its introduction, has led at least one British authority to consider it native. NB: The epithet 'white' elm commonly used by British foresters alluded to the timber of the wych elm.

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

Ulmus × hollandica 'Vegeta', sometimes known as the Huntingdon Elm, is an old English hybrid cultivar raised at Brampton, near Huntingdon, by nurserymen Wood & Ingram in 1746, allegedly from seed collected at nearby Hinchingbrooke Park. In Augustine Henry's day, in the later 19th century, the elms in Hinchingbrooke Park were U. nitens. Richens, noting that wych elm is rare in Huntingdonshire, normally flowering four to six weeks later than field elm, pointed out that unusually favourable circumstances would have had to coincide to produce such seed: "It is possible that, some time in the eighteenth century, the threefold requirements of synchronous flowering of the two species, a south-west wind", "and a mild spring permitting the ripening of the samaras, were met."

<i>Ulmus minor</i> Species of plant

Ulmus minorMill., the field elm, is by far the most polymorphic of the European species, although its taxonomy remains a matter of contention. Its natural range is predominantly south European, extending to Asia Minor and Iran; its northern outposts are the Baltic islands of Öland and Gotland, although it may have been introduced by humans. The tree's typical habitat is low-lying forest along the main rivers, growing in association with oak and ash, where it tolerates summer floods as well as droughts.

<i>Ulmus minor</i> Stricta Elm cultivar

The field elm cultivar Ulmus minor 'Stricta', known as Cornish elm, was commonly found in South West England, Brittany, and south-west Ireland, until the arrival of Dutch elm disease in the late 1960s. The origin of Cornish elm in the south-west of Britain remains a matter of contention. It is commonly assumed to have been introduced from Brittany. It is also considered possible that the tree may have survived the ice ages on lands to the south of Cornwall long since lost to the sea. Henry thought it "probably native in the south of Ireland". Dr Max Coleman of Royal Botanic Garden Edinburgh, arguing in his 2002 paper on British elms that there was no clear distinction between species and subspecies, suggested that known or suspected clones of Ulmus minor, once cultivated and named, should be treated as cultivars, preferred the designation U. minor 'Stricta' to Ulmus minor var. stricta. The DNA of 'Stricta' has been investigated and the cultivar is now known to be a clone.

<i>Ulmus minor</i> Plotii Cultivar of the field elm

The field elm cultivar Ulmus minor 'Plotii', commonly known as Lock elm or Lock's elm, Plot's elm or Plot elm, and first classified as Ulmus sativaMill. var. Lockii and later as Ulmus plotii by Druce in 1907-11, is endemic mainly to the East Midlands of England, notably around the River Witham in Lincolnshire, in the Trent Valley around Newark-on-Trent, and around the village of Laxton, Northamptonshire. Ronald Melville suggested that the tree's distribution may be related to river valley systems, in particular those of the Trent, Witham, Welland, and Nene. Two further populations existed in Gloucestershire. It has been described as Britain's rarest native elm, and recorded by The Wildlife Trust as a nationally scarce species.

<i>Ulmus minor</i> Sarniensis Cultivar of the field elm

The Field Elm cultivar Ulmus minor 'Sarniensis', known variously as Guernsey elm, Jersey elm, Wheatley elm, or Southampton elm, was first described by MacCulloch in 1815 from trees on Guernsey, and was planted in the Royal Horticultural Society's gardens in the 1820s. It was listed in the Loddiges catalogue of 1836 as Ulmus sarniensis and by Loudon in Hortus lignosus londinensis (1838) as U. campestris var. sarniensis. The origin of the tree remains obscure; Richens believed it "a mutant of a French population of Field elm", noting that "elms of similar leaf-form occur in Cotentin and in northern Brittany. They vary much in habit but some have a tendency to pyramidal growth. Whether the distinctive habit first developed on the mainland or in Guernsey is uncertain."

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

Ulmus × hollandica 'Major' is a distinctive cultivar that in England came to be known specifically as theDutch Elm, although all naturally occurring Field Elm Ulmus minor × Wych Elm U. glabra hybrids are loosely termed 'Dutch elm'. It is also known by the cultivar name 'Hollandica'. Nellie Bancroft considered 'Major' either an F2 hybrid or a backcrossing with one of its parents.

<i>Ulmus <span style="font-style:normal;">×</span> hollandica</i> Dutch elm

Ulmus × hollandicaMill. , often known simply as Dutch elm, is a natural hybrid between Wych elm and field elm Ulmus minor which commonly occurs across Europe wherever the ranges of the parent species overlap. In England, according to the field-studies of R. H. Richens, "The largest area [of hybridization] is a band extending across Essex from the Hertfordshire border to southern Suffolk. The next largest is in northern Bedfordshire and adjoining parts of Northamptonshire. Comparable zones occur in Picardy and Cotentin in northern France". Crosses between U. × hollandica and either of the parent species are also classified as U. × hollandica. Ulmus × hollandica hybrids, natural and artificial, have been widely planted elsewhere.

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

The hybrid elm cultivar Ulmus × hollandica 'Belgica', one of a number of hybrids arising from the crossing of Wych Elm with a variety of Field Elm, was reputedly raised in the nurseries of the Abbey of the Dunes, Veurne, in 1694. Popular throughout Belgium and the Netherlands in the 19th century both as an ornamental and as a shelter-belt tree, it was the 'Hollandse iep' in these countries, as distinct from the tree known as 'Dutch Elm' in Great Britain and Ireland since the 17th century: Ulmus × hollandica 'Major'. In Francophone Belgium it was known as orme gras de Malines.

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

The hybrid cultivar Ulmus × hollandica 'Cicestria', commonly known as the 'Chichester Elm', was cloned at the beginning of the 18th century from a tree growing at Chichester Hall, Rawreth, near Danbury, Essex, England, then the home of Thomas Holt White FRS, brother of the naturalist Gilbert White. The tree was first recorded by country parson and botanist Adam Buddle in south-east Essex in 1711, and appeared as U. cicestria in an 1801 catalogue. 'Cicestria' is the original Ulmus × hollandica 'Vegeta', but suffered confusion with the later Huntingdon Elm cultivar by John Claudius Loudon who, without consulting Lindley, accorded the epithet 'Vegeta' to Huntingdon Elm in 1838, as he found the two indistinguishable. J. E. Little in The Journal of Botany (1923) agreed that Buddle's leaves-specimen of Chichester Elm in the Sloane Herbarium seemed to be the same cultivar as Huntingdon Elm: "If so, this elm [Chichester] was in existence and mature some years before the reputed raising of the Huntingdon Elm by Wood of Huntingdon 'about 1746'."

<i>Ulmus minor</i> Atinia Variegata Elm cultivar

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.

<i>Ulmus</i> Purpurea Elm cultivar

The elm cultivar Ulmus 'Purpurea', the purple-leaved elm, was listed and described as Ulmus Stricta Purpurea, the 'Upright Purpled-leaved Elm', by John Frederick Wood, F.H.S., in The Midland Florist and Suburban Horticulturist (1851), as Ulmus purpureaHort. by Wesmael (1863), and as Ulmus campestris var. purpurea, syn. Ulmus purpureaHort. by Petzold and Kirchner in Arboretum Muscaviense (1864). Koch's description followed (1872), the various descriptions appearing to tally. Henry (1913) noted that the Ulmus campestris var. purpureaPetz. & Kirchn. grown at Kew as U. montana var. purpurea was "probably of hybrid origin", Ulmus montana being used at the time both for wych elm cultivars and for some of the U. × hollandica group. His description of Kew's U. montana var. purpurea matches that of the commonly-planted 'Purpurea' of the 20th century. His discussion of it (1913) under U. campestris, however, his name for English Elm, may be the reason why 'Purpurea' is sometimes erroneously called U. procera 'Purpurea' (as in USA and Sweden.

<i>Ulmus</i> Berardii Elm cultivar

The elm cultivar Ulmus 'Berardii', Berard's Elm, was raised in 1865, as Ulmus Berardi, from seeds collected from large specimens of "common elm" growing on the ramparts at Metz, by an employee of the Simon-Louis nursery named Bérard. Carrière (1887), the Späth nursery of Berlin and the Van Houtte nursery of Gentbrugge regarded it as form of a Field Elm, listing it as U. campestris Berardii, the name used by Henry. Cheal's nursery of Crawley distributed it as Ulmus nitens [:Ulmus minor] 'Berardii'. Smith's of Worcester preferred the original, non-specific name, Ulmus 'Berardii'.

The Field Elm cultivar Ulmus minor 'Cucullata', the Hooded elm, was listed by Loddiges of Hackney, London, in their catalogue of 1823 as Ulmus campestris cucullata, and later by Loudon in Arboretum et Fruticetum Britannicum (1838), as U. campestris var. cucullata.

<i>Ulmus minor</i> Argenteo-Variegata Elm cultivar

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.

<i>Ulmus</i> Louis van Houtte Elm cultivar

Ulmus 'Louis van Houtte' is believed to have been first cultivated in Ghent, Belgium circa 1863. It was first mentioned by Franz Deegen in 1886. It was once thought a cultivar of English Elm Ulmus minor 'Atinia', though this derivation has long been questioned; W. J. Bean called it "an elm of uncertain status". Its dissimilarity from the type and its Belgian provenance make the 'Atinia' attribution unlikely. Fontaine (1968) considered it probably a form of U. × hollandica.

<i>Ulmus minor</i> Pendula Elm cultivar

The Field Elm cultivar Ulmus minor 'Pendula' was said to have been raised in Belgium in 1863. It was listed as Ulmus sativa pendula by C. de Vos in 1887, and by Boom in 1959 as a cultivar.

<i>Ulmus minor</i> Suberosa Elm cultivar

The Field Elm cultivar Ulmus minor 'Suberosa', commonly known as the Cork-barked elm, is a slow-growing or dwarf form of conspicuously suberose Field Elm. Of disputed status, it is considered a distinct variety by some botanists, among them Henry (1913), Krüssmann (1984), and Bean (1988), and is sometimes cloned and planted as a cultivar. Henry said the tree "appears to be a common variety in the forests of central Europe", Bean noting that it "occurs in dry habitats". By the proposed rule that known or suspected clones of U. minor, once cultivated and named, should be treated as cultivars, the tree would be designated U. minor 'Suberosa'. The Späth nursery of Berlin distributed an U. campestris suberosa alataKirchn. [:'corky-winged'] from the 1890s to the 1930s.

<i>Ulmus minor</i> Viminalis Elm cultivar

The field elm cultivar Ulmus minor 'Viminalis' (:'willow-like'), occasionally referred to as the twiggy field elm, was raised by Masters in 1817, and listed in 1831 as U. campestris viminalis, without description. Loudon added a general description in 1838, and the Cambridge University Herbarium acquired a leaf specimen of the tree in 1866. Moss, writing in 1912, said that the Ulmus campestris viminalis from Cambridge University Herbarium was the only elm he thought agreed with the original Plot's elm as illustrated by Dr. Plot in 1677 from specimens growing in an avenue and coppice at Hanwell near Banbury. Elwes and Henry (1913) also considered Loudon's Ulmus campestris viminalis to be Dr Plot's elm. Its 19th-century name, U. campestris var. viminalis, led the cultivar to be classified for a time as a variety of English Elm. On the Continent, 'Viminalis' was the Ulmus antarcticaHort., 'zierliche Ulme' [:'dainty elm'] of Kirchner's Arboretum Muscaviense (1864).

The elm cultivar Ulmus 'Turkestanica' was first described by Regel as U. turkestanica in Dieck, Hauptcat. Baumschul. Zöschen (1883) and in Gartenflora (1884). Regel himself stressed that "U. turkestanica was only a preliminary name given by me; I regard this as a form of U. suberosa" [:U. minor ]. Litvinov considered U. turkestanicaRegel a variety of his U. densa, adding that its fruits were "like those of U. foliaceaGilibert" [:U. minor].

References

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