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The American Elm cultivar ''Ulmus americana'' 'Penn Treaty' was raised by the Plant Sciences Data Center of the
/ref>) in what was later named Penn Treaty Park,
The first elm at Haverford, planted in 1840, measured 90 ft (28 m) in height, with a crown diameter of 120 ft (37 m) 100 years later. Its surviving scion in Photograph of the surviving elm in Haverford College Arboretum; haverford.edu/arboretum/arboretum-highlights
/ref>
/ref> In addition, a specimen raised from seed survives on Founder's Green, Haverford College, and is perpetuated by selfed seedlings gathered by the arboretum staff in autumn. Katharine Stanley Nicholson in her ''Historic American trees'' (1922) recorded other 19th-century plantings of scions of the original tree. The tree is not known to be in cultivation beyond
American Horticultural Society
The American Horticultural Society (AHS) is a nonprofit, membership-based organization that promotes excellence in American horticulture. It is headquartered at River Farm in Alexandria, Virginia.
History
Established in 1922, the AHS is one of t ...
. Plants under that name were propagated by the Morris Arboretum, Pennsylvania, Philadelphia, from grafts made in 1945 from a tree at Haverford College
Haverford College ( ) is a private liberal arts college in Haverford, Pennsylvania. It was founded as a men's college in 1833 by members of the Religious Society of Friends (Quakers), began accepting non-Quakers in 1849, and became coeducational ...
, itself a graft, planted in 1840, from the Shackamaxon Treaty Elm – the tree under which William Penn signed his treaty with Native Americans in 1682 (felled by a storm in 1810Nicholson, Katharine Stanley, ''Historic American trees'' (NY, 1922); p.40/ref>) in what was later named Penn Treaty Park,
Kensington
Kensington is a district in the Royal Borough of Kensington and Chelsea in the West End of London, West of Central London.
The district's commercial heart is Kensington High Street, running on an east–west axis. The north-east is taken up b ...
, Pa.
Description
The first elm at Haverford, planted in 1840, measured 90 ft (28 m) in height, with a crown diameter of 120 ft (37 m) 100 years later. Its surviving scion in Haverford College Arboretum
The Haverford College Arboretum () is an arboretum comprising the entire campus of Haverford College, in Haverford, Pennsylvania. It is open daily, dawn to dusk, without charge.
As of 2006, the arboretum contains mature oaks and maples, specimen ...
is an irregularly-branched elm, unlike most selected varieties of American elm./ref>
Pests and diseases
The 1840 Haverford elm was felled in 1977 after it had succumbed to Dutch elm disease.Cultivation
Cuttings from the 1840 Haverford elm were taken in 1915 by C. Cresson Wistar, an alumnus ofHaverford College
Haverford College ( ) is a private liberal arts college in Haverford, Pennsylvania. It was founded as a men's college in 1833 by members of the Religious Society of Friends (Quakers), began accepting non-Quakers in 1849, and became coeducational ...
, and seven scions were planted behind Barclay Hall in the arboretum. Although all but one of the resultant trees have also died, the survivor still thrives (2017).'Treaty Elm'; haverford.edu/arboretum/arboretum-highlights/treaty-elm/ref> In addition, a specimen raised from seed survives on Founder's Green, Haverford College, and is perpetuated by selfed seedlings gathered by the arboretum staff in autumn. Katharine Stanley Nicholson in her ''Historic American trees'' (1922) recorded other 19th-century plantings of scions of the original tree. The tree is not known to be in cultivation beyond
North America
North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...
, nor is it in commerce.
Accessions
None known.References
{{Elm species, varieties, hybrids, hybrid cultivars and species cultivars , state=collapsed American elm cultivar Ulmus