Arboretum » Campus Plant Identification – Mead Hall » Mead Hall southwest corner – Echinocactus grusonii (Golden barrel cactus), Opuntia santa rita, Agave victoriae-reginae (Queen Victoria agave), Pachyphytum oviferum (Moonstones) Mead Hall southwest corner – Echinocactus grusonii (Golden barrel cactus), Opuntia santa rita, Agave victoriae-reginae (Queen Victoria agave), Pachyphytum oviferum (Moonstones)