|Euphorbia cf. serrata|
Euphorbia is genus of 2008 plant species. It is one of the biggest genuses in the plant kingdom. Common names include poinsettia, spurge, or just euphorbia. Spurges can be poisonous if 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). Euphorbia is very large, the only genus that is larger is Senecio, in the Compositae. Euphorbias are commonly plants that do not need a lot of water, like cacti. Pointsettias are commonly called Christmas flowers. There are many smaller genuses in euphorbia. Ricinus (castor bean plant)is very toxic. It is the second most poisonous plant after nerium oleander (family apocynaceae).