Polycnemum Verrucosum (Amaranthaceae), First Record for the Italian Flora and Comparison with Related Species P. Arvense

Polycnemum verrucosum A. F. Lang is recorded for the first time for Italy (Lazio region, Central Italy). Morphological and ecological characteristics of this species, as compared with the related P. arvense L., are presented and discussed. Taxonomical notes are also provided.