Further records of cacti (Cactaceae) from Tarragona Province (Catalonia), Spain.
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.