Brunfelsia is a genus of flowering plants in the family Solanaceae, the nightshades. There are about 50 species described. Linnaeusnamed the genus for the early German herbalist Otto Brunfels (1488–1534). Common names for the genus include raintree.
Like many nightshades, some members of this genus contain toxic and medicinal alkaloids. The plants are known to be poisonous to domestic animals such as cats, dogs, and horses due to their brunfelsamidine content. Toxicity in dogs manifests with strychnine-like gastrointestinal, neurological and cardiac symptoms.
Brunfelsia is a genus of the tribe Petunieae, which also includes Petunia.