fire-on-the-mountain fi·reont·he·mountain uncommon noun 1. poinsettia of United States and eastern Mexico; often confused with Euphorbia heterophylla Synonymspainted leafMexican fire plantEuphorbia cyathophora Related words Broader terms spurge Parts Euphorbia WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
