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Background and aims: Urban horticultural fairs are important places for the food sovereignty (FS) of a city. The richness of ethnospecies and commercialized local foods reflect its dynamism. The utilitarian versatility (UV) represented by the different culinary preparations constitutes an important aspect of the FS. The richness of ethnospecies, local foods and plant parts traded at the Bariloche Farmers' Fair was surveyed and characterized. The predictions propose that the greatest richness of ethnospecies are of exotic origin, and that the greater the UV (in local foods), the greater the cultural importance of the ethnospecies. M&M: A checklist-type ethnobotanical monitoring of all ethnospecies and local foods traded in the 2019 season was carried out. It was complemented with a photographic record and free listings. The UV of each crop was estimated, and the relationship between the use consensus (UC) and the UV of the ethnospecies offered by GLM was analyzed. Results: A total of 186 ethnospecies and 315 local foods were recorded. The most agreed ethnospecies were Petroselinum crispum (65%), Beta vulgaris var. cicla (55%), Rubus idaeus (50%) and the exotic fungus Suillus spp. We found that the ethnospecies with higher UC have higher UV. Conclusions: The alternatives for food use offered by ethnospecies is a key element for farmers as sales reinsurance, but mainly as an element that gives visibility to local plants through homemade preparations. Local foods are biocultural legacies that reflect traditions, but also innovations. [ABSTRACT FROM AUTHOR]