Dudleya anthonyi is a species of perennial succulent plant known commonly as the San Quintín liveforever. It is endemic to the San Quintín volcanic field, which encompasses the Bahia San Quintín and the adjacent Isla San Martín in Baja California. Dudleya anthonyi is a relatively large rosette-forming succulent and is characterized by its leaves and inflorescences that are coated in a white, chalky powder. It is quite similar to its close relative, the widespread Dudleya pulverulenta, but Dudleya anthonyi is distinguished by its narrower and acute basal leaves and bracts, along with narrower and pointed sepals and petals. Like its close relative, Dudleya anthonyi is one of the few members of the genus Dudleya that have a pollination syndrome almost exclusively favoring hummingbird pollinators, adaptations which are reflected by its long, red, and pendent flowers.

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