''Ulmus americana'' 'Columnaris'
| Ulmus americana 'Columnaris' | |
|---|---|
 'Columnaris' 60 ft (18 m) tall and a spread of 18 ft (5.5 m) (circa 1951). | |
| Species | Ulmus americana |
| Cultivar | 'Columnaris' |
| Origin | Conesus Lake, New York, USA |
The American Elm cultivar Ulmus americana 'Columnaris' was propagated from a tree found by Mr John Dunbar at Conesus Lake, New York, before 1920.[1] The tree should not be confused with U. americana var. columnaris Rehder, J. Arnold Arbor. 3: 42, 1922.
Description
As implied by its name, the tree has a fastigiate, columnar form .
Pests and diseases
No specific information available, but the species as a whole is highly susceptible to Dutch Elm Disease and Elm Yellows; it is also moderately preferred for feeding and reproduction by the adult Elm Leaf Beetle Xanthogaleruca luteola [2], and highly preferred for feeding by the Japanese Beetle Popillia japonica [3] [4] in the United States. U. americana is also the most susceptible of all the elms to verticillium wilt.[5]
Cultivation
'Columnaris' is not known to have been cultivated beyond the United States, and is no longer in commerce.
Accessions
- North America
- Morton Arboretum. Specimen in the Columnar Tree Section reputed to be "in good health" in the autumn of 2006. Acc. no. 1041-41, (graft).
References
- ↑ Green, Peter Shaw (1964). "Registration of cultivar names in Ulmus". Arnoldia. Arnold Arboretum, Harvard University. 24 (6–8): 41–80. Retrieved 16 February 2017.
- ↑ Miller, Fredric; Ware, George (2001-02-01). "Resistance of Temperate Chinese Elms (Ulmus spp.) to Feeding by the Adult Elm Leaf Beetle (Coleoptera: Chrysomelidae)". Journal of Economic Entomology. Oxford University Press (OUP). 94 (1): 162–166. doi:10.1603/0022-0493-94.1.162. ISSN 0022-0493.
- ↑ Miller, Fredric; Ware, George; Jackson, Jennifer (2001-04-01). "Preference of Temperate Chinese Elms ( Ulmus spp.) for the Adult Japanese Beetle (Coleoptera: Scarabaeidae)". Journal of Economic Entomology. Oxford University Press (OUP). 94 (2): 445–448. doi:10.1603/0022-0493-94.2.445. ISSN 0022-0493.
- ↑ "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.
- ↑ Pegg, G. F. & Brady, B. L. (2002). Verticillium Wilts. CABI Publishing. ISBN 0-85199-529-2
External links
- http://www.bgci.org/plant_search.php?action=Find&ftrGenus=Ulmus&ftrRedList=&ftrSpecies=&ftrRedList1997=&ftrEpithet=&ftrCWR=&x=41&y=19NB. Botanic Gardens Conservation International register
- http://redwood.mortonarb.org/PageBuilder?cid=2&qid=13 Morton Arboretum catalogue
- "Herbarium specimen - L.1590846". Botany catalogues. Naturalis Biodiversity Center. Sheet described as U. americana var. columnaris Rehder (Arnold Arboretum specimen, 1931)