Leaf explants of four species of licorice (Glycyrrhiza glabra L., G. uralensis F., G. echinata L., and G. squamulosa F.) were cultured on Murashige and Skoog (MS) basal medium. G. glabra L. and G. uralensis F. formed adventitious roots from calli on the medium containing NAA (1mgl^-1). Both calli induced from G. echinata L. and G. squamulosa F. formed somatic embryos on the medium containing NAA (1mgl^-1) and BAP (1mgl^-1), or 2, 4-D (0.5mgl^-1) alone. Plantlets regenerated from the somatic embryos were transplanted to soil.