The

hybrid Hybrid may refer to: Science * Hybrid (biology), an offspring resulting from cross-breeding ** Hybrid grape, grape varieties produced by cross-breeding two ''Vitis'' species ** Hybridity, the property of a hybrid plant which is a union of two dif ...

elm cultivar ''Ulmus × intermedia'' 'Lincoln' was selected from crossings of the Slippery, or Red, Elm ''

Ulmus rubra ''Ulmus rubra'', the slippery elm, is a species of elm native to eastern North America. Other common names include red elm, gray elm, soft elm, moose elm, and Indian elm. Description ''Ulmus rubra'' is a medium-sized deciduous tree with a sprea ...

'' (female parent) and the Siberian Elm '' Ulmus pumila'' made in

Aurora, Illinois Aurora is a city in the Chicago metropolitan area located partially in DuPage County, Illinois, DuPage, Kane County, Illinois, Kane, Kendall County, Illinois, Kendall, and Will County, Illinois, Will counties in the U.S. state of Illinois. Locat ...

, circa 1958 and patented in 1983 by Samuel Clegg of Clegg Landscaping, Plainfield, IL and Charles McFarland of

Urbana, IL Urbana ( ) is a city in and the county seat of Champaign County, Illinois, United States. As of the 2020 census, Urbana had a population of 38,336. As of the 2010 United States Census, Urbana is the 38th-most populous municipality in Illinois. It ...

. Clegg, S.E., & McFarland, C. P. (1981). ''United States Patent Application PP05015''. US Patent Office

/ref>Obituary, Samuel E. Clegg Jnr., ''Herald News'', 14 Oct. 2006, Joliet, Illinois.

Description

'Lincoln' is parabolic in shape, with excurrent branching; the bark is slightly fissured, and dark grey-green in colour. The branches are slender and smooth, with moderately abundant lenticels; the branching angle at the axis approximately 55°. The leaves are leaf shape, cordante-acuminate, about 9 cm long by 5 cm wide, with doubly serrate margins, the slightly scabrous upper surfaces a lustrous dark green, turning yellow in the fall. The foliage is retained well into autum

Pests and diseases

Although reported (in patent) to be resistant to Dutch elm disease, 'Lincoln' has not been widely tested. In trials in

Oklahoma Oklahoma (; Choctaw language, Choctaw: ; chr, ᎣᎧᎳᎰᎹ, ''Okalahoma'' ) is a U.S. state, state in the South Central United States, South Central region of the United States, bordered by Texas on the south and west, Kansas on the nor ...

, the clone was heavily to severely damaged by the Elm Leaf Beetle '' Xanthogaleruca luteola''.

Cultivation

Commercial propagation has been by either softwood cuttings or budding onto Siberian elm rootstocks. 'Lincoln' is not known to be in cultivation beyond North America. Hardiness: USDA zone 3 (hardy to −25 F).

Synonymy

*''Ulmus rubra'' 'Lincoln': in error, various authorities.

Accessions

Not known.

Nurseries

Not known.

References

Ulmus × intermedia cultivar Ulmus articles with images Ulmus {{Ulmaceae-stub