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Bergmann's Elm - Ulmus bergmanniana Elm Family: Ulmaceae. This species has been assessed by the Morton Arboretum and is considered suitable for shade tree planting in North America. It is the most cold-hardy of the elms. [Cirrus Home] [Tree Encyclopedia] |
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Bergmann's Elm is native to China, generally found growing between 1500-2600 meters in Anhui, Gansu, Henan, Hubei, Hunan, Jiangxi, Shaanxi, Shanxi, Sichuan, Yunnan, and Zhejiang provinces. [1] This tree is very closely related
to the Wych Elm Ulmus glabra; it can reach a height of 26 m
with a wide-spreading crown. The bark is longitudinally
fissured, and varies in colour from greyish-white to dark
grey. The leaves range from obovate to elliptic, less than
16 cm long, and bluish-green in color. The perfect,
wind-pollinated apetalous flowers are produced on
second-year shoots in February, followed by generally
orbicular samarae less than 16 mm in diameter. Branchlets do
not possess the corky wings characteristic of many other elm
species. |
Bark is fissured and superficially resembles that of
pin oak.
Bergmann's Elm Foliage
| The Morton Arboretum is one of the largest living Ulmus collections in the world (more than 30 species, in addition to numerous infraspecific taxa, hybrids, and cultivars) and has the source of numerous elm cultivars. In May of 2008, almost every elm species showed signs of stress with extensive holes in its foliage. I'm not sure what causes this or if it is perhaps normal. |
References
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