The American Elm cultivar Ulmus americana 'Nigricans' Dieck was cloned from a selection made from seedlings raised by the Zöschener Baumschule, Zöschen, Germany, and listed by Georg Dieck with a brief description in Haupt-catalog der Obst- und gehölzbaumschulen des ritterguts Zöschen bei Merseburg, 1885.[1]

An 'American Black Elm', "a variety of Ulmus americana of more erect habit", was marketed by Trumbull and Beebe's nursery, San Francisco, in the 1890s, along with a batch of other European elm cultivars.[2]

Description

The tree was distinguished by its very dark green foliage. Occasionally listed as 'Nigrescens', it has caused confusion with a U. minor cultivar of that name.[3]

Cultivation

No specimens are known to survive.

Synonymy

References

  1. ^ Dieck, G., Haupt-catalog der Obst- und gehölzbaumschulen des ritterguts Zöschen bei Merseburg (Zöschen 1885), p.80
  2. ^ 'Trumbull & Beebe's descriptive catalogue of fruit and ornamental trees', San Francisco, 1892; p.35
  3. ^ Green, Peter Shaw (1964). "Registration of cultivar names in Ulmus". Arnoldia. 24 (6–8). Arnold Arboretum, Harvard University: 41–80. Retrieved 16 February 2017.