painted leaf n 1: poinsettia of United States and eastern Mexico; often confused with Euphorbia heterophylla [syn: {fire-on-the-mountain}, {Mexican fire plant}, {Euphorbia cyathophora}] 2: tropical American plant having poisonous milk and showy tapering usually scarlet petallike leaves surrounding small yellow flowers [syn: {poinsettia}, {Christmas star}, {Christmas flower}, {lobster plant}, {Mexican flameleaf}, {Euphorbia pulcherrima}]