Elm introduction
Elm is distributed in northeastern China, North China, Northwest and Southwest provinces and regions, North Korea, the former Soviet Union, Mongolia also has a distribution, often born at an altitude of 1,000-2,500 meters below the slopes of the mountains, valleys, Kawarthas, hills and sandy hillocks and other places. Elm is a masculine tree species, light, drought, cold, barren, no choice of soil, adaptability, developed root system, wind resistance, soil retention force.
Elm is a deciduous tree, up to 25 meters high, 1 meter diameter at breast height, in the dry and barren place to grow into a shrub; young trees with smooth bark, gray-brown or light gray, the bark of the large trees dark gray, the flowers first leaves open, in the leaf axils of the living branches into clusters, samaras sparse inverted ovate-orbicular, flowering and fruiting period from March to June.