There are 75 species of Pseudotsuga in around the world. At present, in Vietnam, there is only one specie has been detected Pseudotsuga chinensis Dode or Pseudotsuga chinensis var. brevifolia (W. C. Cheng & L. K. Fu) Farjon&Silba according to Nguyen Tien Hiep. Pseudotsuga brevifolia is one of 33 national level endangered pine species in Vietnam. According to the Red book of Vietnam (2007), Pseudotsuga brevifolia only grows on the limestone mountain with the altitude more than 1000 meters above sea level, and under threaten by over exploitation and natural habitat dilapidation.