Chorological notes on the non-native flora of the province of Tarragona (Catalonia, Spain)

Com a resultat de recents treballs de camp a la província de Tarragona (NE Espanya, Catalunya), oferim en el present treball nous registres de plantes vasculars aŀlòctones. Cenchrus orientalis, Manihot grahamii, Melica chilensis i Panicum capillare subsp. hillmanii probablement es citen per primera vegada a Espanya, mentre que Aloe ferox, Canna ×generalis, Cenchrus setaceus, Convolvulus farinosus, Ficus rubiginosa, Jarava plumosa, Koelreuteria paniculata, Lycianthes rantonnetii, Nassella tenuissima, Paraserianthes lophantha, Plumbago auriculata, Podranea ricasoliana, Proboscidea louisianica, Sedum palmeri, Solanum bonariense, Tipuana tipu, Tradescantia pallida i Vitis ×ruggerii es citen per primer cop de la província de Tarragona. Moltes d'aquestes plantes són invasores o presenten potencial invasor, i algunes són considerades també males herbes de cultius. Afegim un recull de dades addicionals de plantes aŀlòctones de les quals es tenien poques citacions al territori estudiat.Recent field work in the province of Tarragona (NE Spain, Catalonia) yielded several new records of non-native vascular plants. Cenchrus orientalis, Manihot grahamii, Melica chilensis and Panicum capillare subsp. hillmanii are probably reported for the first time from Spain, while Aloe ferox, Canna ×generalis, Cenchrus setaceus, Convolvulus farinosus, Ficus rubiginosa, Jarava plumosa, Koelreuteria paniculata, Lycianthes rantonnetii, Nassella tenuissima, Paraserianthes lophantha, Plumbago auriculata, Podranea ricasoliana, Proboscidea louisianica, Sedum palmeri, Solanum bonariense, Tipuana tipu, Tradescantia pallida and Vitis ×ruggerii are reported for the first time from the province of Tarragona. Several of these are potential or genuine invasive species and/or agricultural weeds. Miscellaneous additional records are presented for some further alien taxa with only few earlier records in the study area