The natural distribution, habitat conditions and natural regeneration of indigenous tree species, Sorbus pohuashanensis (Hance) Hedl. were studied based on literature, specimen and field investigations. 8 populations were sampled in Shandong, Shanxi, Hebei and Liaoning provinces. 7 populations (171 families in total) of them were used for analysis of geographical variation in 10 morphological and growth traits of 1-year-old seedlings. Genetic structure and diversity of all the 8 populations and mating...