A chorological analysis of the mountains from central Argentina. Is all what we call Chaco really Chaco?

CABIDO, M; FUNES, G; PUCHETA, E; VENDRAMINI, F.; DÍAZ, S

CANDOLLEA

CONSERVATOIRE ET JARDIN BOTANIQUES VILLE GENEVE

Lugar: Ginebra; Año: 1998 vol. 53 p. 321 - 331

0373-2967

The aim of the study is to provide a chorological interpretation of  the mountains in Central Argentina in order to establish its actual  phytogeographic position and to discuss the status of the Sierra Chaco  District within Argentina. A subdivision of the regional flora (more  than 600 species) into 6 chorotypes (phytogeographic groups or  categories) and the classification and ordination of 20 sites along an  altitudinal gradient (1000 to 2600 m) on the basis of chorotypes  frequencies are  presented. The classification analysis shows that the  sites are grouped according to their chorotype frequencies into two  main clusters comprising sites above and below 1850 m respectively. It  is discussed whether sites above that boundary belong to the Chaco  Phytogeograpic Province or should be included in a different unit.