Abstract: In this paper we compared the leaf areas, morphology of leaf epidermic hairs and stomata in four varieties of sea buckthorn (Hippophae rhamnoides L. ). The result showed that sea buckthorn from China had a relatively smaller leaf area, more layers of ep idermic hairs and a larger stomata density than sea buckthorn from Russia. All the characteristics of their two hybrids were between the ones of the two parents, but closer to the mother plant. The results indicated that leaf area, layers of epidermic hairs, stomata area and
density were correlated with drought resistance in the species of H. rham noides L.

Key words: Sea buckthorn, Hippophae rhamnoides L., Morphological characteristics of leaf surface, Drought resistance