Pteroceltis tatarinowii

Pteroceltis tatarinowii, common names Blue Sandalwood, Tara wingceltis, or Qing Tan (Chinese: 青檀; pinyin: Qīngtán), is a tree, indigenous to China, growing to 20 meters in height. It is used for fine timber, its bark fiber is used to make Xuan paper, and oil is extracted from its seeds.