Elm.

is a genus of the Department of Science and Ology.


Form:

deciduous trees, up to 25m , chest diameter 1m


; The bark was dark gray, cracked, and rough. The twigs are gray, slender, and lined up in two columns. Leaf-shaped long oval shape, long 2-6cm , the first tip, the base slightly crooked, the cause of irregular single jagged teeth. Flowering before early spring leaves, clusters were born on the branches last year. The winged fruit is nearly round and the seeds are located in the middle of the winged fruit. The flowering period

3-4


, and the fruit

4-6


in October.


Distribution:

produced in the Northeast, North China, Northwest China and East China, north China and Huaibei Plain area cultivation is particularly common, the Soviet Union, Mongolia and North Korea also have distribution.


Habits:

, cold, drought-resistant, can adapt to arid barren and saline soil. Fast growth,

30


tree height 17m , chest diameter 42cm


. Life expectancy can be more than 100 years. Strong germination, resistant to pruning. The main root is deep, the side root is developed, the wind is resistant and the soil is strong. Strong resistance to toxic gases such as soot and hydrogen fluoride.


Ornamental characteristics and garden use:eucalyptus tree trunk straight, tree-shaped tall, strong shade, adaptability, fast growth, urban and rural greening of important tree species, planted as road trees, shade trees
, protective forests andfour sides
greening is not suitable. It is often shrub-shaped in dry, cold places and used as a hedge. Also because of its old stem root germination force is strong, can be excavated from the wild to make bonsai. It is also one of the main tree species in forestry to create wind-proof forests, soil and water protection and saline afforestation.