Karyotype Analysis of an Endemic Species Pollination biology of Primulina repanda var.guilinensis and P.glandulosa var.yangshuoensis Four newly recorded Gesneraceous species from Vietnam Primulina bobaiensis, a new species of Gesnericaeae from Guangxi, China and its phylogenetic placement revealed by the chloroplast matK gene Primulina bullata, a new species of Primulina  (Gesneriaceae) from Guangxi Primulina beiliuensis B. Pan & S. X. Huang, a new species of Gesneriaceae from limestone areas in Guangxi, China Pollen Morphology of the Primulina(Gesneriaceae)from South China and Its Taxonomic Significance Pollen Morphology of the Primulina(Gesneriaceae)from South China and Its Taxonomic Significance The ecological and biological characteristics of an endangered plant, Primulina tabacum Hance Functional and evolutionary analyses of Primulina heterotricha CYC1C gene in tobacco and Arabidopsis transformation systems New Chromosome Counts and Their Taxonomic Implications in Primulina sensu lato (Gesneriaceae)