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油松(Pinus tabulae formis)是一个典型的华北植物区系成分。油松林也是华北地区的代表性针叶林之一,北部分布于阴山山脉的大青山、乌拉山以及西部的贺兰山,在东北部也出现于大兴安岭南端的黄岗山,这些地区以北则很少发现;南部以川陕鄂的秦巴山地为界;东部除辽东半岛东南部和胶东半岛为赤松林分布外,整个华北地区的低中山地带广泛分布着油松林;西至甘肃到青海东部的大通河流域。在陕西境内的巴
Pinus tabulae formis is a typical North China flora. Pinus tabulaeformis forest is also one of the representative coniferous forests in North China. The Daqingshan Mountain, Wula Mountain and Helan Mountain in the west of Yinshan Mountain in the north and Huanggang Mountain in the south of Daxingan Mountain in the northeast are rarely found to the north of these mountains . The southern part is bounded by the Qinba Mountain in Sichuan, Shaanxi and Hubei provinces. In the eastern part, Pinus tabulaeformis is distributed in the low and middle mountains of North China except for the southeast of Liaodong Peninsula and the Jiaodong Peninsula, and the Datonghe River in the west of Gansu to the east of Qinghai Watershed. Pakistan in Shaanxi Province