Brunfelsia is a genus of flowering plants belonging to subfamily Petunioideae of the nightshade family Solanaceae. The 50 or so species have been grouped into the three sections: Brunfelsia (circa 22 species), Franciscea (circa 18 species) and Guianenses (circa 6 species), which differ significantly in both distribution and characteristics, although molecular data have revealed that only two sections are natural (monophyletic), namely the Caribbean section Brunfelsia and a common section for all South American species. Linnaeus named the genus for the early German herbalist Otto Brunfels (1488–1534).
Otto Brunfels, German theologian and botanist in whose honour the genus Brunfelsia is named.
Common names for the genus include raintree, yesterday-today-tomorrow and lady of the night.
Brunfelsia spp. are neotropical shrubs, small trees and (rarely) lianas. The leaves are alternately arranged, simple, and usually oval in shape. The large flowers have salverform corollas with five broad lobes and narrow tubes.
Typical habitat for wild species is light woodland and thickets.