Plant communities and phytogeographical units from NW San Juan (High Central Andes of Argentina)

MARTÍNEZ CARRETERO, E., DALMASSO, A., MARQUEZ, J. & MARTINELLI, M.

CANDOLLEA

CONSERVATOIRE ET JARDIN BOTANIQUES VILLE GENEVE

Lugar: Geneve; Año: 2010

0373-2967

Vegetation of the High Central Andes of Argentina was studied in northwest San Juan (MAB Reserve of San Guillermo) from a phytosociological point of view. Four new associations were proposed: two shrubland associations, the Artemisietum paramilloensis and the Lycio-Ephedretum rupestri, and two  grassland associations, the Jaravetum chrysophyllae and the Jaravetum absconditae. The latitudinal and altitudinal boundaries of the Monte, Puna and High Andes phytogeographic provinces were established for the study area. This area constitutes the floristic and biogeographic transition between northern (Bolivia) and southern (Mendoza, Argentina) Puna elements, belonging to the Calamagrostietea vicunarum class, and to the Stipo-Lycietea class, respectively