Sintaxones ruderales y adventicios en la zona del Alto Valle de Río Negro y Neuquén

this work comes up from a revision of several studies on weeds in the alto valle of río negro and neuquén, the common aim was to know -from sociological and ecological point of view- about the vegetation growing along roadsides,and in cultivated areas of the region dedicated to fruit and vegetable farming. thus the sintaxons included here are those which have been registered up to the present like a form to order and guide to those who make similar work. they are ordered in a sintaxonomical schema, with phytosociological, ecological and chorological references.