A revision of Elaeagnus L. (Elaeagnaceae) in mainland China Ecological Anatomy Characteristics of Secondary Xylem Cells of Two Xerophytes in Elaeagnaceae Morphological Observation on Pure Cultured Strains from Root Nodules of Elaeagnaceae Survey in study on chemical constituents from plants of Elaeagnaceae Lectotypifications of six names of Chinese taxa in Elaeagnus (Elaeagnaceae)