Which cactus species are poisonous?

Since many cacti and succulents look similar, I will address a toxic class of succulents known as the Euphorbia family. Euphorbias contain a white sap in their leaves that can irritate skin and burn eyes. While not all people react as intensely, t... read more

There are no known species of cactus which possess poisonous spines. Irritation, redness and infection caused by cactus spines are normally the result of bacteria or tiny hair-like barbs that remain lodged in the skin after spines are extracted. read more

While many animals are smart enough to avoid plants that can make them sick, not all will. Euphorbias. One of the more commonly known poisonous succulent is the Euphorbia family. Euphorbias contain a white sap in their leaves that can irritate skin. read more