Euphorbia resinifera forms dense low clumps — up to 3 or 4 feet high — of four-sided stems, edged with small spines. It has small bright yellow flowers in summer, and comes from the Atlas ...

But the most poisonous euphorbia is the leafless succulent E. resinifera (resin spurge) that hails from the Atlas Mountains in Morocco and contains an active compound so pungent it is 10,000 times ...

More information: Imane Kherrab et al, Methanolic extract of Euphorbia resinifera propolis improves cognitive functions in adult male rats with chronic unpredictable mild stress, Neuroscience and ...

Euphorbia resinifera, aka the resin spurge, is not to be eaten. Just to be safe, you probably shouldn’t even look at it.

But if you happened to chomp down on Euphorbia resinifera, a cactus-like plant also known as the resin spurge, you'd seriously regret it — and not for the reason you might think.