Banisteriopsis is a genus of flowering plants in the family Malpighiaceae. There are about 65 species which range from northeastern Mexico and Cuba through Central and South America to northern Argentina. Most are native to Brazil, Bolivia, Colombia, Ecuador, and Peru.
One well-known species is Banisteriopsis caapi, the source of ayahuasca.
65 species are accepted.
Except for ornamental purposes, growing, selling or possessing Banisteriopsis spp. is prohibited by Louisiana State Act 159.