Ulmus 'Aspera'
Encyclopedia
'Aspera' was an elm
Elm
Elms are deciduous and semi-deciduous trees comprising the genus Ulmus in the plant family Ulmaceae. The dozens of species are found in temperate and tropical-montane regions of North America and Eurasia, ranging southward into Indonesia. Elms are components of many kinds of natural forests...

 cultivar listed (as U. stricta aspera) without description by Loddiges
Loddiges
The Loddiges family managed one of the most notable of the eighteenth and nineteenth century plant nurseries that traded in and introduced exotic plants, trees, shrubs, ferns, palms and orchids into European gardens....

, (Hackney
Hackney Central
Hackney Central is the central district of the London Borough of Hackney in London, England. It comprises the area roughly surrounding, and extending north from Mare Street. It is situated north east of Charing Cross...

, London
London
London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

), in his catalogue of 1823. Considered only "possibly procera" by Green .
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