Princeton's WordNet

1. fire-on-the-mountain, painted leaf, Mexican fire plant, Euphorbia cyathophora(noun)

   poinsettia of United States and eastern Mexico; often confused with Euphorbia heterophylla

2. poinsettia, Christmas star, Christmas flower, lobster plant, Mexican flameleaf, painted leaf, Euphorbia pulcherrima(noun)

   tropical American plant having poisonous milk and showy tapering usually scarlet petallike leaves surrounding small yellow flowers