Ulmus laciniata
{{Short description|Species of tree}}
{{Speciesbox
|image = Lacinata leaves.jpg
|image_caption = Ulmus laciniata leaves
| genus = Ulmus
| display_parents = 2
| parent = Ulmus sect. Ulmus
|species = laciniata
| status = LC
| status_system = IUCN3.1
|authority = (Trautv.) Mayr
|synonyms = *Ulmus laciniata f. holophylla Nakai
- Ulmus major Hohen. var. heterophylla Maxim.
- Ulmus montana With. var. laciniata Trautv.
}}
Ulmus laciniata (Trautv.) Mayr, known variously as the Manchurian, cut-leaf, or lobed elm, is a deciduous tree native to the humid ravine forests of Japan, Korea, northern China, eastern Siberia and Sakhalin, growing alongside Cercidiphyllum japonicum, Aesculus turbinata, and Pterocarya rhoifolia,Sasaki, Y. (1979) Der Verband Pterocaryon rhoifoliae in Japan. In: Vegetation und Landschaft Japans. Eds: Miyawaki, A., and Okuda, S. Bull. Yokohama Phytosoc. Soc. Japan. 16, 1979. pp. 213-226Ohwi, J. (1984). Flora of Japan. {{ISBN|978-0-87474-708-9}}Qian, H., Krestov, P., Fu, P.-Y., Wang, Q.-L., Song, J.-S. & Chourmouzis, C. Phytogeography of Northeast Asia. http://www.biosoil.ru/files/00000052.pdf at elevations of 700–2200 m, though sometimes lower in more northern latitudes, notably in Hokkaido.
Classification
The tree is similar to the Wych elm Ulmus glabra, and was originally treated as such by Houtzagers and Henry, but later accorded species status of its own largely by reason of the enormous disjunction in their respective areas; U. glabra extending across Europe as far as the Urals, several thousand kilometres from U. laciniata in the Far East. Richens (1983), however, regarded U. laciniata Trautv. as "not distinct from wych at species level".Richens, R. H., Elm (cambridge, 1983), p.279
Description
Ulmus laciniata is chiefly distinguished by its leaves, often regularly incised to form between three and seven apical lobes, giving rise to its common name, the cut-leaf elm.[http://www.asianflora.com/Ulmaceae/Ulmus-laciniata.htm U. laciniata, asianflora.com]{{Naturalis Biodiversity Center |id=L.1582070 }} Sheet labelled U. montana With. laciniata (Amur specimen, with samarae); {{cite web|website=Herbarium catalogue|title=Ulmus montana var. laciniata Trautv. (Hakodate, Hokkaido, Japan, 1861)|publisher=Board of Trustees of the Royal Botanic Gardens, Kew|access-date=17 October 2016|url=http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000852634}} Incorrectly relabelled U. parvifolia. The cusped leaves are normally a feature of adult trees, which can also bear leaves without this feature.[https://archive.org/details/treesofgreatbrit07elweuoft/page/1864/mode/2up?view=theater Elwes, Henry John; Henry, Augustine (1913). The Trees of Great Britain & Ireland. Vol. 7. p.1865] The tree can reach a height of 27 m, although the trunk rarely exceeds 0.5 m d.b.h. The bark of young trees is dark, grey-brown, exfoliating in flakes, but becomes shallowly fissured with maturity. The unwinged branchlets bear laciniate leaves usually obtriangular, < 18 cm in length. Hishiyama, C. (Ed.). (2011). A picture book of the 255 tree species found in Noyama (park in Tokyo) and surrounding areas, p.80. (in Japanese). Sebeidoshuppan, Japan. {{ISBN|9784415310183}} The perfect wind-pollinated apetalous flowers are produced on second-year shoots in April (March in England), followed in May by elliptic < 20 × 14 mm samarae lightly-notched at the apex.Fu, L., Xin, Y. & Whittemore, A. (2002). Ulmaceae, in Wu, Z. & Raven, P. (eds) Flora of China, Vol. 5 (Ulmaceae through Basellaceae). Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis, USA. [http://flora.huh.harvard.edu/china/PDF/PDF05/Ulmus.pdf]Ware, G. (1995). Little-known elms from China: landscape tree possibilities. Journal of Arboriculture, (Nov. 1995). International Society of Arboriculture, Champaign, Illinois, US. [http://www.ces.ncsu.edu/fletcher/programs/nursery/metria/metria8/m87.pdf] {{Webarchive|url=https://web.archive.org/web/20071130221822/http://www.ces.ncsu.edu/fletcher/programs/nursery/metria/metria8/m87.pdf |date=2007-11-30 }}White, J & More, D. (2003). Trees of Britain & Northern Europe. Cassell's, London Growth is moderate; the trunk of one specimen planted on permanently damp, fertile soil in south Hampshire, UK, increased in diameter at breast height (d.b.h.) by a modest average of 1.7 cm per annum.Brookes, A. H. (2020). Great Fontley Elm Trial, 2020 Report. Butterfly Conservation, Lulworth, UK.
Image:laciniata gff 001.jpg|14-year-old tree at Great Fontley, UK, in spring
Image:Ulmus laciniata leaf.jpg|U. laciniata leaf in midsummer
Image:laciniata samara.jpg|U. laciniata samara
File:DMU.laciniata twigs.JPG|U. laciniata twigs
Image:Ulmus lacinata bark, 18-year old tree.jpg|Bark of 18-year-old tree
Pests and diseases
File:Xanthogaleruca luteola 20060905 530.jpg
Natural populations of U. laciniata have only a marginal resistance to Dutch elm disease (DED), rated 2 out of 5,Heybroek, H. M., Goudzwaard, L, Kaljee, H. (2009). Iep of olm, karakterboom van de Lage Landen (:Elm, a tree with character of the Low Countries). KNNV, Uitgeverij. {{ISBN|9789050112819}} below that of the Japanese Elm.{{cite journal | last = Heybroek | first=Hans M.|journal = Proceedings of the Dutch Elm Disease Symposium and Workshop, October 5–9, Winnipeg, Manitoba|title = The Japanese elm species and their value for the Dutch elm breeding program|pages = 78–90|date=1981|url=http://krishikosh.egranth.ac.in/bitstream/1/2055474/1/MPKV-1936.pdf}} Moreover, in trials in Italy and the US,{{Cite web|url=http://www.sunshinenursery.com/survey.htm|access-date=17 July 2017|archive-url=https://web.archive.org/web/20110719132152/http://www.sunshinenursery.com/survey.htm|title=Elm Leaf Beetle Survey|archive-date=2011-07-19}} U. laciniata was severely damaged by elm leaf beetles Xanthogaleruca luteola, indeed in Italy chemical controls were necessary to ensure the tree's survival, unlike its compatriots U. parvifolia and U. davidiana var. japonica which survived unscathed. The species is also susceptible to Elm Yellows.{{cite journal|last1=Mittempergher|first1=L|last2=Santini|first2=A|journal=Investigacion Agraria: Sistemas y Recursos Forestales|title=The history of elm breeding|volume=13|issue=1|pages=161–177|date=2004|url=http://www.inia.es/gcontrec/Pub/161-177-(14)-The_history_1161943529015.pdf}}
Cultivation
The species was introduced to the West in 1905, but remains uncommon in cultivation. A specimen, obtained from the Leon Chenault nursery in Orléans, stood in the Ryston Hall arboretum, Norfolk,[http://www.rystonhall.co.uk/ rystonhall.co.uk/] in the early 20th century.{{cite book| title=Ryston Hall Arboretum catalogue |date=c. 1920 |pages=13–14|url=https://commons.wikimedia.org/wiki/File:Ryston_Hall_Arboretum_Catalogue_c._1920_pages_13,14.jpg}} The tree was comprehensively evaluated in the Netherlands in the 1950s as a potential source of anti-fungal genes for use in the Dutch elm hybridization programme, but was found intolerant of all but the most sheltered and humid conditions.{{cite book|last1=Heybroek|first1=H.M.|editor1-last=Sticklen|editor1-first=Mariam B.|editor2-last=Sherald|editor2-first=James L.|title=Dutch Elm Disease Research|date=1993|publisher=Springer-Verlag|location=New York, USA|pages=16–25|access-date=26 October 2017|chapter=The Dutch Elm Breeding Program|chapter-url=https://books.google.com/books?id=avvxBwAAQBAJ&pg=PA16|isbn=978-1-4615-6874-2}}
Trees planted in England at the Sir Harold Hillier Gardens (sole accession died 2007) and as part of Butterfly Conservation's elm trials at Great Fontley have confirmed the Dutch assessment Trees grown from seed commence flowering in their eighth year. The Dutch elm breeding programme revealed that the tree has a relatively high degree (39% seed viability) of self-fertility.Went, J. A. (1954). The Dutch elm disease – Summary of 15 years' hybridization and selection work (1937–1952). European Journal of Plant Pathology, Vol 60, 2, March 1954. The species is very difficult to propagate from hardwood cuttings, even under mist, often rooting but failing to leaf. However, the tree was propagated and marketed in the UK by the Hillier & Sons nursery, Winchester, Hampshire, from 1948, but sales were very low, with only three sold from 1962 to 1977.Hillier & Sons (1977). Catalogue of Trees & Shrubs. Hillier, Ampfield, UK.Hillier & Sons Sales inventory 1962 to 1977 (unpublished).
There are no known cultivars of U. laciniata, nor is it known to be in commerce.
Notable trees
Rarely grown in the West, and rather susceptible to DED, there are few, if any, notable trees in cultivation. The original TROBI Champion planted at the Sir Harold Hillier Gardens, Romsey, in 1982 died from DED 27 years later. The oldest known trees in the UK, planted in 1981, are at the Harcourt Arboretum in Oxfordshire.
Subspecies and varieties
A putative variety was recognized by Rehder: Ulmus laciniata var. nikkoensis - the Nikko Elm, 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.{{cite journal|last=Hans|first=A. S.|year=1981|title=Compatibility and Crossability Studies in Ulmus|journal=Silvae Genetica|volume= 30|pages=4–5}}
Hybrid cultivars
Several hybrid cultivars were raised as part of the Dutch elm breeding programme at the Dorschkamp Research Institute for Forestry & Landscape Planning, Wageningen, crossing the species with hybrids of U. wallichiana and U. minor to produce Clone no. 560, which in turn was crossed with Clone 720 (itself a complex cross involving U. glabra, U. minor, U. wallichiana, and U. pumila) to produce Clone 1234. None of these clones have been commercially released.
Accessions
;North America
- Arnold Arboretum, US. Acc. no. 17909 wild collected, 250–2001 wild collected in Korea.
- Denver Botanic Gardens, US. Neither acc. no. nor origin disclosed.
- Morton Arboretum, US. Acc. no. 50–95 wild collected, Liaoning Province, China.
- United States National Arboretum, Washington, D.C., US. Acc. nos.76252, 68989.
;Europe
- Grange Farm Arboretum, Lincolnshire, UK. Grafted tree, acc. no. 701.
- Harcourt Arboretum (University of Oxford Botanic Garden), UK. Acc. no. 19810611, from seed obtained from the Moscow Botanical Garden [http://www.moscow.info/parks/botanical-gardens.aspx] in 1981. 5 specimens, all @ 3 m tall (2008), in Bluebell Wood.
- Hortus Botanicus Nationalis, Salaspils, Latvia. Acc. nos. 18132,3,4,5,8.
- Linnaean Gardens of Uppsala, Sweden. Acc. no. 2001–1660, obtained from South Korea.
- Royal Botanic Garden Edinburgh, UK. Acc. nos. 20022150, grown from seed sold by Lawyer Nursery, US; 20030906 and 20030907, both wild collected in South Korea.Royal Botanic Garden Edinburgh. (2017). List of Living Accessions: Ulmus [http://elmer.rbge.org.uk/bgbase/livcol/bgbaselivcol.php?cfg=bgbase/livcol/bgbaselivcol.cfg&startrow=26]
- Tallinn Botanic Garden, Estonia. [http://www.tba.ee/index.php?lang=eng]. No accession details available.
References
{{Reflist}}
External links
- Ulmus laciniata distribution map: linnaeus.nrm.se [http://linnaeus.nrm.se/flora/di/ulma/ulmus/ulmuglav.jpg]
- [http://www.efloras.org/object_page.aspx?object_id=50119&flora_id=2 efloras.org U. laciniata leaves and fruit illustration]
- [http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200006327 efloras.org U. laciniata description]
- [http://ppbc.iplant.cn/sp/11535 Photographs labelled U. laciniata on Plant Photo Bank of China, ppbc.iplant]
{{Elm species, varieties, hybrids, hybrid cultivars and species cultivars |state=collapsed}}
{{Taxonbar|from=Q4115140}}