Three major compounds were isolated but not crystallized by thin-layer chromatography from the previously reported cardioactive semi-purified extracts o f Urginea maritima (LINNB) BAKER (white squill) tissue cultures. Compounds separated were different from the standard squill bufadienolides by ultraviolet, infrared and mass spectra. N o bufadienolides were identified in the tissue cultures studied.Red-purple pigments were produced in squill tissue cultures grown under light. These pigments were tentatively identified by absorption spectra and color reactions as anthocyanins containing a catechol group. N o such pigments were found in squill tissue cultures grown in the dark.