Nikko Elm - U. laciniata var. 'nikkoensis'
Family Ulmaceae - Zelkova, Hackberry, Elm

Named for the Nikkō National Park near the city of Nikkō, 125 km north of Tokyo.
Custom Search
Nikko Elm foliage and bark
These are the leaves of the Nikko Elm, Ulmus laciniata var. 'nikkoensis'. This photo was used by Dr. Andrew Hipp, Plant Systematist and Herbarium Curator at The Morton Arboretum, in his paper "Evaluating the taxonomy of elms (Ulmus) using DNA sequence data". [2]Nikko Elm Bark
Nikko Elm
23-year-old Nikko Elm
'The (DNA sequence of) Japanese endemic Ulmus laciniata var. nikkoensis comes out among two accessions of U. davidiana var. japonica. This entity is a local form collected near Nikko in central Honshu, Japan.

The variety may represent a solitary hybrid between U. laciniata and U. davidiana var. japonica (G. Ware, pers. comm.); as the plants grown in the U.S. all appear to be progeny of a single (1925) introduction, the Nikko elm may be better thought of as a cultivar than as a true variety; additional fieldwork will be needed to assess this. Our finding that this plant falls among the U. davidiana var. japonica accessions in the cpDNA tree supports the argument that one of its parents is U. japonica, despite the horned appearance of the leaves, which suggest the influence of U. laciniata.' [2]

References

  1. Flora of China, Ulmus laciniata
  2. Andrew Hipp, Linus Gog, Jaime A. Weber, Alicia B. Geisler,
    Evaluating the taxonomy of elms (Ulmus) using DNA sequence data, The Morton Arboretum.
Tree Encyclopedia / North American Insects & Spiders is dedicated to providing scientific and educational resources for our users through use of large images and macro photographs of flora and fauna.
Custom Search
Family Ulmaceae - Zelkovas, Hackberries and Elms
There are about 200 species of trees and shrubs in Ulmaceae. Elms fell victim to Dutch Elm disease during the 1950s; until that time, they were the premier shade tree along the streets of our American towns and cities. The Morton Arboretum in past years has bred and marketed five new elm varieties resistant to Dutch elm disease.
Insects & Spiders Home | Elm Index | Tree Encyclopedia | Trees Index
© Red Planet Inc.