Obregonia
 Obregonia the artichoke cactus is a genus of cacti with a single species Obregonia denegrii. The genus Obregonia is named after Álvaro Obregón. This rare species resembles an inverted green pine cone with a woolly center. It grows slowly in culture and requires little water. It benefits from full sun and is multiplied by seed.It may have traditional uses as medicine or a psychoactive. It is one of the closest living relatives of Lophophora williamsii.