Based on a floristic survey in SE Peloponnisos, focusing on Mt Parnonas and its southeastern environment, new localities and annotations are presented for 14 endemic or otherwise noteworthy taxa. Seven taxa, Asperula lutea subsp. rigidula, Centaurea pseudocadmea, C. subsericans, Cephalaria setulifera, Convolvulus boissieri subsp. parnassicus, Klasea cretica, Scutellaria rupestris subsp. cytherea, are reported for the first time from mainland Peloponnisos. The taxonomic status of Minuartia favargeri is reconsidered and its inclusion into M. pichleri confirmed by the study of several new populations.