Jardín botánico Alberto Roth, Botanical garden in Posadas, Argentina

The Jardín botánico Alberto Roth covers about 11 hectares in the Kennedy neighbourhood, Chacra 223, at the mouth of the Zaimán stream on the Paraná River, south of Posadas. Its grounds hold 154 species: 109 native plants (70.8%), mostly from the Paranaense phytogeographic province and its mixed-forest district, plus 45 exotic species (29.2%). Fabaceae (23 species) and Myrtaceae (12) are the best represented families. The site also has a library, an orchid house, a fountain and several paths.

The site was founded in 1981 after Oscar Adam donated his land to the city, and it received its current name in 1988 to honor Swiss naturalist Alberto Roth. This naming reflected his dedication to protecting and studying plants across South America.

The garden's name honours Alberto Roth, a Swiss conservationist who arrived in Argentina in 1924 and was named the region's best soil conservator in 1957. Its herbarium carries the code POSADAS, and the grounds include a library and an orchid house alongside the plantings.

The garden lies in Barrio Kennedy, Chacra 223, at the mouth of the Zaimán stream where it meets the Paraná River, south of central Posadas; the coordinates are -27.4085241, -55.8963747. The grounds hold a library, an orchid house, a fountain and several paths, so allow time to walk between them. Confirm opening times with the municipality before setting out.

A large portion of the collection focuses on plants native to the Paranaense phytogeographic region, making this place important for understanding this particular ecosystem. This regional focus gives the garden special scientific value.