Abstract:Based on a field investigation that consisted of 74 sample zones across a total sample area of 436.872 hm2, we describe the population characteristics of yew (Taxus cuspidata), and the relationship between its distribution and site factors. There were a total of 179 631 individual yew plants in the 34 544 hm2 nature reserve, a very large population. The population distribution was correlated to elevation, slope position, aspect and slope gradient. Altitudes between 700 and 800 m had the greatest number of plants and thus the preferred habitat for natural yew populations. More individuals were found on shady slopes than sunny slopes, and more individuals at the upper and mid-slope positions than at the toe of the slope. There were more yew individuals located on slopes with a slope gradient <15° and numbers decreased substantially with increasing slope gradient.