Ulmus laevis 'Colorans'

The European White Elm cultivar Ulmus laevis 'Colorans' was listed as U. effusa (: laevis) var. colorans by Kirchner^[1] in Petzold^[2] & Kirchner, Arboretum Muscaviense (1864).^[3]

Peter Shaw Green (1964) suggested that Herder's U. campestris Linn. rubescens, described in Gartenflora (1871),^[4] 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.^[5]

The tree was described by Kirchner as having leaves turning a rich scarlet red in autumn, not golden yellow.^[3][5]

• 
  Red autumn leaves, U. laevis

'Colorans' was rare in cultivation. Kirchner planted two specimens in the Arboretum Muscaviense.^[3] 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.

• Ulmus effusa var. rubescens: Schwerin,^[6] Mitteilungen der Deutschen dendrologischen gesellschaft 20: 423, 1911.^[7]
• Ulmus pedunculata (: laevis) var. erubescens: Elwes,^[8] in Elwes, H. J. & Henry, A. (1913). The Trees of Great Britain & Ireland. Vol. VII.^[9]
• (?) U. campestris Linn. rubescens: Herder Gartenflora 20: 347 1871.^[4]

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