The European White Elm cultivar Ulmus laevis 'Colorans' was listed as U. effusa (: laevis) var. colorans by Kirchnerkiki.huh.harvard.edu in Petzoldkiki.huh.harvard.edu & Kirchner, Arboretum Muscaviense (1864).
Peter Shaw Green (1964) suggested that Herder's U. campestris Linn. rubescens, described in Gartenflora (1871),Gartenflora 20 (1871) p.347 by its name a wych elm cultivar with "reddening leaves", from Yelagin Island, may have been an earlier listing of a 'Colorans'-type U. laevis under a mistaken species name.
Description The tree was described by Kirchner as having leaves turning a rich scarlet red in autumn, not golden yellow.
Cultivation 'Colorans' was rare in cultivation. Kirchner planted two specimens in the Arboretum Muscaviense. A tree said to be of this type stood near Hailsham, East Sussex, UK (on the Cuckoo Trail); regrowth from it survives there (2006). The tree is not known to remain in cultivation elsewhere.
Synonymy Ulmus effusa var. rubescens: Schwerin,harvard.edu Mitteilungen der Deutschen dendrologischen gesellschaft 20: 423, 1911.Mitteilungen der Deutschen Dendrologischen Gesellschaft (1911), p.423 Ulmus pedunculata (: laevis) var. erubescens: Elwes,harvard.edu in Elwes, H. J. & Henry, A. (1913). The Trees of Great Britain & Ireland. Vol. VII. Republished 2004 Cambridge University Press, (?) U. campestris Linn. rubescens: Herder Gartenflora 20: 347 1871.
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