STUDY ON THE BRYOFLORA AND GEOGRAPHIC DISTRIBUTION OF NORTHERN HEBEI PROVINCE, CHINA

Northern Hebei Province mentioned in the title refers to the vast area between Yanshan Mountains(including Yanshan Mountains) and Inner Mongolia Plateau, which lies approximately 40°35′-42°40′N and 113°27′-119°50′E. On the basis of the physiognomy causes of the formation, the different earth shapes and vegetation types, Northern Hebei Province is generally divided into four districts: North Plateau, Jixibei Basins, Jibei Mountains and Yanshan Mountains.This thesis is mostly based on about 2000 packages of bryophytes which were mainly collected by the author in Northern Hebei Province from July to August in 1998. Of all these specimens, 36 families,104 genera and 270 species(including 4 varieties and 3 forms) have been studied and identified. Moreover, using Abundance Index, we can see that Northern Hebei Province is richer in diversity of mosses compared with other 9 mountains in China. The bryoflora in Northern Hebei Province can be divided into 11 geographical elements.