Morphological, karyological and molecular delimitation of two gentians: Gentiana crassicaulis versus G. tibetica Optimum harvest study of Gentiana crassicaulis in Ludian CHARACTERIZATION OF SEVERAL ISOZYMES FROM EMBRYOGENIC CALLI AND SOMATIC EMBRYOS AT DIFFERENT DEVELOPMENTAL STAGES OF GENTLANACRASSICAULIS DUTHIE EX BURKILL Study on seed biological characteristics of Gentiana crassicaulis