Ulmus 'Christine Buisman'

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Ulmus
Cultivar
'Christine Buisman'
Origin
Netherlands

The elm cultivar 'Christine Buisman' is one of the early results of the Dutch elm breeding programme initiated in response to the less virulent form of Dutch elm disease that afflicted Europe's elms after the First World War ^[1]. It was cloned in 1931 as No. '24', ostensibly from a selection of Ulmus minor (but reckoned to be Ulmus × hollandica by Melville ^[2]) found in Madrid in 1928, which offered some resistance to Dutch elm disease, and released for sale in 1936. However, the tree had not been thoroughly evaluated in the field, and quickly proved prone to cankers caused by Coral Spot fungus Nectria cinnabarina as it lacked resistance mechanisms to this fungus. Moreover, neither its shape nor foliage were considered very attractive, and it had limited resistance to sea winds; production soon ceased ^[3].

1 Cultivars
2 Arboreta etc. accessions
3 Etymology
4 Synonymy
5 References

[edit] Cultivars

U. '297'. Dutch self-pollinated tree. Specimen planted at Preston Park, Brighton, in 1964; 19 m high, 43 cm d.b.h. in 2001. Other examples of the same can be found on waste land north of Patcham, Brighton.

[edit] Arboreta etc. accessions

North America

Arnold Arboretum acc. nos. 135-54, 273-46
Bartlett Tree Experts, acc. no. 1371
Dawes Arboretum [1], Newark, Ohio. 3 trees, as U. carpinifolia 'Christine Buisman', no acc. details available.
Holden Arboretum acc. nos. 54-271, 55-446
Longwood Gardens acc. no. 1967-0875
Morton Arboretum acc. no. 223-49 (as Ulmus procera 'Christine Buisman')

Europe

Brighton & Hove City Council, UK, NCCPG Elm Collection [2] (as Ulmus × hollandica 'Christine Buisman'). UK champion: Palmeira Avenue, Hove, 16 m high, 33 cm d.b.h. in 2002 ^[4]. Three splendid examples grow at Carden Park, Hollingbury, Brighton.

[edit] Etymology

The tree is named for Christine Buisman, one of the original team of elm researchers at Wageningen who discovered the cause of Dutch elm disease in 1927.

[edit] Synonymy

Ulmus 'Buisman': Plant Buyer's Guide, ed. 6. 285, 1958, without description.
Ulmus × hollandica 'Christine Buisman': Melville, and various arboreta listings in USA and Europe.
Ulmus procera 'Christine Buisman': Morton Arboretum Catalogue 2006.

[edit] References

^ Heybroek, H. M. (1993). The Dutch Elm Breeding Program. In Sticklen & Sherald (Eds.)(1993). Dutch Elm Disease Research, Chapter 3. Springer Verlag, New York, USA
^ Melville, R. (1978). On the discrimination of species in hybrid swarms with special reference to Ulmus and the nomenclature of U. minor (Mill.) and U. carpinifolia (Gled.). Taxon 27: 345-351.
^ Heybroek, H. M. (1983). Resistant Elms for Europe. In Burdekin, D. A. (Ed.) Research on Dutch elm disease in Europe. For. Comm. Bull. 60. pp 108 - 113.
^ Johnson, Owen (ed.) (2003). Champion Trees of Britain & Ireland. Whittet Press, ISBN 9781873580615.