Moses-in-the-cradle (Tradescantia spathacea; formerly Rhoeo spathacea), also called boat lily and numerous other common names, is a member of the spiderwort family. It is prized for its dark metallic green leaves that have glossy purple undersides. Small white flowers are borne within purple, boat-shaped bracts (the cradle) that are formed in leaf axils. Indoor Plants, by George B. Briggs and Clyde L. Calvin, suggests that the plants need full sun and moderate humidity, temperature, and water. The plant does not require pruning but should be fertilized four to five times per year from April to August.