水冬瓜赤杨(Alnus sibirica Fisch.),老乡或林区职工称为水冬瓜,属于桦木科的中等乔木。是长白山小兴安岭林区常见的树种,多生于水湿地、沿河岸的两侧、沟底,常和柳树、胡桃楸等树种混生在一起,有时也形成小片纯林。水冬瓜在形态上与毛赤杨(A. hirsuta Turcz.)、东北赤杨(A. mandshurica (Call.) Hand. -Mazz.)、赤杨(A. japonica Sieh. et Water melon Alnus (Alnus sibirica Fisch.), Fellow or forest workers called water melon, belongs to the birch family of middle trees. It is a common tree species in the small Xing’an Mountains forest area of ​​Changbai Mountain. It is mostly born in the wetland and mixed with tree species such as willow and walnut trees along the banks of the riverbanks, often with small trees. Water melon is morphologically related to A. hirsuta Turcz., A. mandshurica (Call.) Hand. -Mazz., A. japonica Sieh et