Ulmus 'Betulaefolia Nigrescens'

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Ulmus 'Betulaefolia Nigrescens'
GenusUlmus
Cultivar'Betulaefolia Nigrescens'
OriginBelgium

The elm cultivar Ulmus 'Betulaefolia Nigrescens', the Black Birch-leaved Elm, reportedly a seedling of a purplish-leaved elm, was first described by Pynaert in 1879 as U. campestris betulaefolia nigrescens.[1][2] An U. campestris betulaefolia nigrescens Hort. was distributed by the Späth nursery, Berlin, in the 1890s and early 1900s.[3][4][5]

Green considered the 1930s' cultivar U. nigricans (U. 'Nigricans') a synonym of 'Betulaefolia Nigrescens'.[2]

The cultivar is not to be confused with Pynaert's U. campestris latifolia nigricans, described in the same 1879 publication (Green's U. 'Latifolia Nigricans' ).

Description

The tree was said to have dark, birch-shaped leaves.[2] Späth's cultivar was described as having "brownish leaves".[4] No herbarium leaf-specimens of this cultivar are known.

Pests and diseases

Not known.

Cultivation

No specimens are known to survive. One tree was planted in 1897 as U. campestris betulaefolia nigrescens, the 'Black Birch-leaved Elm', at the

Wentworth Elm);[7] the current list of Living Accessions held in the Garden per se does not list the plant.[8]
A specimen of U. 'Betulaefolia Nigrescens', obtained from Späth before 1914, stood in the Ryston Hall arboretum, Norfolk,[9] in the early 20th century.[10] The cultivar is not known to have been introduced to Australasia.

Putative specimen

An old, slow-growing elm on Duncan Place, Leith Links (2023), with dark browny-green leaves not dissimilar to those of some species of birch, may be one of the three Späth 'Betulaefolia Nigrescens' sent to Edinburgh in the early 20th century. It stands one tree away from the convex-leaved elm Späth sent at the same time as (erroneously) Ulmus racemosa.

  • Duncan Place birch-leaved elm, summer
    Duncan Place birch-leaved elm, summer
  • Duncan Place birch-leaved elm, spring
    Duncan Place birch-leaved elm, spring
  • Duncan Place birch-leaved elm, fruit
    Duncan Place birch-leaved elm, fruit
  • Duncan Place birch-leaved elm, branching
    Duncan Place birch-leaved elm, branching
  • Duncan Place birch-leaved elm, foliage
    Duncan Place birch-leaved elm, foliage
  • Duncan Place birch-leaved elm, dried leaves
    Duncan Place birch-leaved elm, dried leaves
  • Duncan Place birch-leaved elm, bark
    Duncan Place birch-leaved elm, bark

References

  1. ^ Pynaert, Édouard-Christophe (1879). "Trois nouvelles variétés d'Ormes". Bulletins d'arboriculture, de culture potagère et de floriculture: 57. Retrieved 14 December 2016.
  2. ^ a b c Green, Peter Shaw (1964). "Registration of cultivar names in Ulmus". Arnoldia. 24 (6–8). Arnold Arboretum, Harvard University: 41–80. Retrieved 16 February 2017.
  3. ^ Späth, L., Catalogue 79 (1890-91; Berlin), p.113
  4. ^ a b Katalog (PDF). Vol. 108. Berlin, Germany: L. Späth Baumschulenweg. 1902–1903. pp. 132–133.
  5. ^ Späth, L., Catalogue 158 (1913-14; Berlin), p.137
  6. ^ Saunders, William; Macoun, William Tyrrell (1899). Catalogue of the trees and shrubs in the arboretum and botanic gardens at the central experimental farm (2 ed.). pp. 74–75.
  7. ^ Accessions book. Royal Botanic Garden Edinburgh. 1902. pp. 45, 47.
  8. ^ "List of Living Accessions: Ulmus". Royal Botanic Garden Edinburgh. Retrieved 21 September 2016.
  9. ^ rystonhall.co.uk/
  10. ^ Ryston Hall Arboretum catalogue. c. 1920. pp. 13–14.
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