Arboretum » Campus Plant Identification – Mead Hall » Mead Hall south Mead Hall south Aloe dichotoma (Quiver tree), Pachycereus marginatus (Mexican fencepost cactus), Mammillaria geminispina (Twin-spined cactus), Opuntia basilaris (Short beavertail cactus), Agave victoriae-reginae (Queen Victoria agave)