Patriot (elm cultivar)

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The American hybrid cultivar Patriot [1] is a U. S. Department of Agriculture introduction derived in 1980 from a crossing of the American hybrid Urban with the Wilson's Elm (now treated as Japanese Elm U. davidiana var. japonica) cultivar Prospector. It develops an upsweeping crown, ultimately becoming a fastigiate vase-shape, and is capable of very rapid growth, the parent tree in Ohio attaining a height of 13 m in as many years after it was sown. The foliage is dark green, turning yellow in autumn.

Patriot appears immune to elm yellows and also has a very high resistance to Dutch elm disease, but only a moderate tolerance of elm leaf beetles. It is cold hardy, and performs best in moist but well-drained soils. In trials in the hot and arid climate of eastern Arizona [2], it did not perform as well as some other American hybrids such as Frontier and Regal, but not as badly as others such as New Horizon and Sapporo Autumn Gold.

1 Arboreta etc. accessions
- 1.1 North America
- 1.2 Europe
2 Nurseries
- 2.1 North America
- 2.2 Europe
3 References
4 External links

[edit] Arboreta etc. accessions

[edit] North America

Arnold Arboretum acc. no. 136-98
Bartlett Tree Experts acc. nos. 2001-252/3/4, 2001-492/3, 2003-965, 2003-1007/8, 00-224
Holden Arboretum acc. nos. 00-125, 2001-154
Morton Arboretum acc. no. 122-2001

[edit] Europe

None known.

[edit] Nurseries

[edit] North America

J. Frank Schmidt & Son [3], Boring, Oregon.
Pea Ridge Forest [4], Hermann, Missouri.
Sunshine Nursery [5], Clinton, OK.

[edit] Europe

None known.

[edit] References

Santamour, J., Frank, S. & Bentz, S. (1995). Updated checklist of elm (Ulmus) cultivars for use in North America. Journal of Arboriculture, 21:3 (May 1995), 121-131. International Society of Arboriculture, Champaign, Illinois, USA.

[edit] External links

http://www.extension.iastate.edu/Publications/SUL4.pdf Summary, inc. photographs, of elm cultivars resistant to Dutch elm disease available in the USA.
http://fletcher.ces.state.nc.us/programs/nursery/metria/metria11/warren/elm.htm Warren, K., J. Frank Schmidt & Son Co. (2002). The Status of Elms in the Nursery Industry in 2000.