Echinacea species are generally used as predictable healer for strengthen the immune system ranges from external and internal uses. Echinacea purpurea, Echinacea angustifolia and Echinacea pallida are the most medicinally used species. In this research the fluid extract of Echinacea angustifolia root and Echinacea purpurea whole plant used in different concentrations to examine their cytotoxic effect on the human leukaemic cell line HL60. The cytotoxic effect determined by counting the cell viability (cell proliferation) before and after treatment with Echinacea concentrations, the inhibition...