Dahanayake, N.Yue-Sheng, Y.2019-01-032019-01-032013Tropical Agricultural Research and Extension,16(1):p.25-30https://dl.nsf.gov.lk/handle/1/24074ChimeraChromosomePurple coneflowerOctaploidTissue cultureIn vitro induction of octaploid from colchicine-treated tetraploid petiole explants of purple coneflower (echinacea purpurea l.)