The plant communities present along an altitudinal transect between 3.000-3.600 m above sea level around Chingaza lake, Cundinamarca, Colombia, are described following the Zurich-Montpellier System. The zonal plant communities (WALTER. 1964) belong to the life zones refered to as Paramo and Andean by CUATRECASAS (1934, 1958) and RANGEL et al., (1982). The azonal plant communities (marsh communities) are briefly studied. New information about synecological aspects and geographic distribution is provided together with a provisional sintaxonomic classification of the vegetation of the area.