The
American Elm 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'' 'Nigricans'
Dieck was cloned from a selection made from seedlings raised by the Zöschener Baumschule,
Zöschen
Zöschen is a village and a former municipality in the district Saalekreis, in Saxony-Anhalt, Germany. Since 31 December 2009, it is part of the town Leuna.
Former municipalities in Saxony-Anhalt
Leuna
{{Saalekreis-geo-stub ...
,
Germany
Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...
, and listed by
Georg Dieck
Georg Dieck (28 April 1847 in Zöschen – 21 October 1925 in Zöschen) was a German entomologist and botanist.
After attending high school in Naumburg, he studied natural sciences at Jena, where he was a pupil and assistant of Ernst Haeckel. In 1 ...
with a brief description in ''Haupt-catalog der Obst- und gehölzbaumschulen des ritterguts Zöschen bei Merseburg'', 1885.
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.
'Trumbull & Beebe's descriptive catalogue of fruit and ornamental trees', San Francisco, 1892; p.35
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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.
Cultivation
No specimens are known to survive.
Synonymy
*''U. americana'' f. ''nigrescens'' Dieck: Schelle in Beissner et al
''Handbuch der Laubholz-Benennung'' 87. 1903
References
{{Elm species, varieties, hybrids, hybrid cultivars and species cultivars , state=collapsed
American elm cultivar
Ulmus articles missing images
Ulmus
Missing elm cultivars