The

American Elm ''Ulmus americana'', generally known as the American elm or, less commonly, as the white elm or water elm, is a species of elm native to eastern North America, naturally occurring from Nova Scotia west to Alberta and Montana, and south to F ...

cultivar A cultivar is a type of cultivated plant that people have selected for desired traits and when propagated retain those traits. Methods used to propagate cultivars include: division, root and stem cuttings, offsets, grafting, tissue culture ...

''Ulmus americana'' 'Incisa' was first described by Loudon in 1838 from a specimen in the Horticultural Society's Garden. Loudon, J. C., ''Arboretum et fruticetum britannicum;'', Vol.III, 1883; p.1406
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Description

The tree had "leaves somewhat more deeply serrated and rather smaller" than the type, Loudon likening them to those of ''Ulmus effusa''. Leaves of an ''U. americana'' f. matching description of cultivar 'Incisa' (Iowa, 1956)

Cultivation

The specimen in the Horticultural Society's Garden was 27 ft tall in 1834; Loudon considered it striking enough for a plate (''Arboretum et fruticetum britannicum;'' Vol.II). No specimens are known to survive, though forms with deeply serrated leaves sometimes occur in the wild.

References

{{Elm species, varieties, hybrids, hybrid cultivars and species cultivars , state=collapsed American elm cultivar Ulmus Missing elm cultivars