Peyote

Lophophora williamsii , is a small, spineless cactus. It is native to southwestern Texas and through central Mexico. It is found primarily in the Chihuahuan desert and in the states of Tamaulipas and San Luis Potosi among scrub, especially where there is limestone.

It is well known for its psychoactive alkaloids, particularly mescaline. It is used world wide as an entheogen, and supplement to various transcendence practices, including meditation, psychonautics, and psychedelic psychotherapy. Peyote has a long history of ritualistic and medicinal use by indigenous Americans. It flowers from March through May, and sometimes as late as September. The flowers are pink, with thigmotactic anthers (like Opuntia).