Ulmus × viminalis 'Gracilis'
| Ulmus × viminalis | |
|---|---|
| Hybrid parentage | U. minor × U. minor 'Plotii' |
| Cultivar | 'Gracilis' |
Ulmus × viminalis Lodd. 'Gracilis' [:'slender'] is believed to be a hybrid cultivar derived from the crossing U. minor × U. minor 'Plotii'. 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 forms of U. × viminalis.[3] A 1929 herbarium specimen held at the Hortus Botanicus Leiden is labelled U. campestris var. viminalis f. gracilis (see External links below).
Description
None available. The Leiden herbarium specimen shows a leaf distinct from that of the type tree, 'Viminalis', with narrower, almost hair-like (and scarcely double) teeth (see External links below).
Pests and diseases
Trees of the U. × 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" (PDF). Arnoldia. Arnold Arboretum, Harvard University. 24 (6–8): 41–80. Retrieved 20 June 2016.
External links
- "Herbarium specimen - WAG.1853217". Botany catalogues. Naturalis Biodiversity Center. Sheet described as U. campestris var. viminalis f. gracilis