synanthropic flora in the Mendoza (Argentina) urban area

The synanthropic flora in the Mendoza urban area was studied in terms of its three most relevant sub-environments: house and school gardens, parks and borders of narrow ditches used to irrigate the whole city. The current synanthropic flora comprises 487 species, 8 native and 479 alien species. Neophytes include 282 genera and 104 families, with the dominant families being Fabaceae, comprising 41 species, Myrthaceae (38 spp), Rosaceae and Oleaceae (24 spp), all of which together represent 26% of the total richness recorded. Ephemerophytes, non-naturalized plants, represent 25.4% of the urban flora. Xenoergasiophytes and ergasiophytes are dominant in gardens and parks, whereas xenophytes grow in irrigation ditches across the city. Considering life forms, nanophaerophytes are prevalent in all three sub-environments, but succulents and therophytes are absent from ditches. The number of non-native plant species is increasing in the urban area of Mendoza, especially in the suburbs, and many of them at times become invasive.