Discussion on translation of ionone and megastigmane Discussion on translation of ionone and megastigmane Chemical constituents from Viola yedoensis A revision on several species of Viola (Violaceae)from China Structure of Cyclotide: Cycloviolacin O2 BIOSYSTEMATICAL STUDIES ON NORTHEAST CHINA VICIA L.Ⅲ.PRELIMINARY CYTOLOGICAL OBSERVATIONS ON VICIA CRACCA GROUP Cloning and analysis of rDNA ITS sequences from 11 medicinal plants in Viola L.