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|Euphorbia cf. serrata|
Many of these plants have develped a defence against herbivory: They are poisonous when swallowed. The Euphorbia family is in the group Malpighiales, one of the largest groups in the plant kingdoms. The euphorbia family also includes crotons (Codiaeum), castor bean plants (ricinus), and hogworts (Croton).
Euphorbias are commonly plants that do not need a lot of water, like cacti. Pointsettias are commonly called Christmas flowers. There are many smaller genera in Euphorbia. Ricinus (castor bean plant) is very toxic. It is the second most poisonous plant after Nerium oleander (family Apocynaceae).