Ulmus minor 'Viminalis Gracilis'
The Field Elm cultivar Ulmus minor 'Viminalis Gracilis' [:'slender'] is a form of U. minor 'Viminalis'. Cultivars listed as Ulmus gracilis Hort. by Kirchner (1864),[1] and as U. scabra viminalis gracilis Hort. by Dieck (1885),[2] were considered by Green to be forms of Melville's U. × viminalis.[3] A 1929 herbarium specimen held at the Hortus Botanicus Leiden is labelled U. campestris var. viminalis f. gracilis, implying a cultivar that differed from the 'type' tree.[4]
| Ulmus minor 'Viminalis Gracilis' | |
|---|---|
| Species | Ulmus minor |
| Cultivar | 'Gracilis' |
Description
The epithet 'gracilis' usually refers to the slender habit of a cultivar. Dippel (1892), who treated the 'Viminalis' group as a form of U. montana (sometimes used for hybrids in his day), described viminalis f. gracilis as a small to medium-sized tree, with even finer, more hanging branches than type-'Viminalis', and smaller, narrower, almost slit-edged leaves.[5] The Leiden herbarium specimen shows a leaf apparently distinct from that of the type, with narrower, almost hair-like, scarcely double teeth (see 'External links' below).
Pests and diseases
Trees of the U. minor 'Viminalis' group are very susceptible to Dutch elm disease.
Cultivation
No specimens are known to survive.
References
- Petzold; Kirchner (1864). Arboretum Muscaviense. p. 551.
- Dieck, Zoschen, Germany, (1885) 'Haupt-catalog der Obst- und gehölzbaumschulen des ritterguts Zöschen bei Merseburg, p. 82
- Green, Peter Shaw (1964). "Registration of cultivar names in Ulmus". Arnoldia. Arnold Arboretum, Harvard University. 24 (6–8): 41–80. Retrieved 16 February 2017.
- Leiden 'Viminalis Gracilis', bioportal.naturalis.nl
- Dippel, Leopold, Handbuch der Laubholzkunde, Pt.2 (Berlin, 1892), p.30
External links
- "Herbarium specimen - WAG.1853217". Botany catalogues. Naturalis Biodiversity Center. Sheet labelled U. campestris var. viminalis f. gracilis (Leiden specimen)
- "Herbarium specimen - L.1582431". Botany catalogues. Naturalis Biodiversity Center. Sheet labelled U. viminalis gracilis (Leiden specimen)
- "Herbarium specimen - L.1582075". Botany catalogues. Naturalis Biodiversity Center. Sheet labelled U. montana Sm. var. viminalis Koch f. gracilis (1901)
- "Herbarium specimen - E00824784". Herbarium Catalogue. Royal Botanic Garden Edinburgh. Sheet labelled U. montana Sm. var. viminalis f. gracilis = U. procera f. viminalis [ = U. minor 'Viminalis ]