The American Elm Ulmus americana cultivar 'Beaverlodge' was selected as a seedling in 1925 at the Beaverlodge Experimental Farm, Morden, part of the Lacombe Research Centre, Alberta, for its hardiness and vigour, and released in 1954.
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Shot on location in the northern Albertan communities of Sexsmith, Beaverlodge, and Grande Prairie, the project features two parallel narratives of farm families dealing with the emotional and financial restructuring after hail destroys much of their harvest.
'Brandon' is a cultivar of the American Elm Ulmus americana, raised by Lacombe Nurseries, Lacombe, Alberta, Canada, before 1969; it may be synonymous with another cultivar from the same source, known as 'Patmore'.
The American Elm Ulmus americana cultivar 'Delaware' was originally selected (as tree number 218) from 35,000 seedlings inoculated with the Dutch elm disease fungus in USDA trials at Morristown, New Jersey.
The American Elm Ulmus americana cultivar 'Klehmii' was cloned from a tree growing at Arlington Heights by Mr Charles Klehm, proprietor of the Charles Klehm & Son nursery.
Plants under that name were raised at the Morris Arboretum, Pennsylvania, Philadelphia, from grafts made in 1945 from a tree at Haverford College, itself a graft from the Shackamaxon Treaty Elm (felled by a storm in 1810) in what was later named Penn Treaty Park, Kensington, Pa.
The American Elm Ulmus americana cultivar 'Pyramidata' was a selection cloned by the Baudriller nursery, Angers, France, c.