A long the altitudinal gradient of Serranía del Perijá (Cesar-Colombia) five communities of Bryophytes were described (two of these communities in the subandina low – tropical belt and three in the subandean low-high belt). Characteristics of these communities depend of factors such as the climate (humidity and light intensity), structure and composition on the fanerogamic vegetation. Statistical analysis followed the Braun-Blanquet school using Twinspan software. In all the altitudinal zones forms growth more common are smooth mats, rough mats, and threads.