Euphorbia | List of Euphorbia species | Euphorbia milii | King Juba's Euphorbia | Euphorbia tirucalli | Euphorbia resinifera | Euphorbia heterophylla | Euphorbia antisyphilitica | euphorbia |
Resiniferatoxin (RTX) is a naturally occurring chemical found in resin spurge (Euphorbia resinifera), a cactus-like plant commonly found in Morocco, and in Euphorbia poissonii found in northern Nigeria.