Recent field work in the Spanish province of Tarragona yielded new records for several interesting cacti (Cactaceae). New provincial records are presented for the following taxa (species preceded by an * have not been reported before from the autonomous region of Catalonia): Cylindropuntia pallida, *C. prolifera, *C. tunicata, Mortolopuntia schickendantzii, Opuntia aurantiaca, *O. dejecta, O. elata, O. elatior, O. engelmannii, O. leucotricha, O. lindheimeri var. linguiformis and Salmonopuntia salmiana. Several of these are potentially or genuinely invasive species. Invasive populations previously referred to Opuntia engelmannii are here ascribed to a form of O. phaeacantha. All species are illustrated.