A study of relict communities of thermophilous and laurel forest vegetation on Fuerteventura is presented. We describe four syntaxa, an alliance Astericion sericii all. nova and two associations, Bupleuro handiense-Maytenetum canariensis ass. nova and Carlino salicifoliae-Echietum famarae ass. nova (Oleo cerasiformis-Rhamnetea crenulatae). An association Echio handienseVisneetum mocanerae ass. nova belongs to Pruno hixae-Lauretea novocanariensi. These communities are small remnants of two well-represented types of vegetation in the central and western Canaries. At present, they are confined to very small localities on this island. This scarcity is partially related to bioclimatic factors but is fundamentally due to intense use of the natural resources by humans since the initial settlement of the islands, around 2100-2200 years before present. A chorological study of plant associations belonging to the above alliances, based on the Geobotanic Information System (GBOTIS), as well as a summarised phytosociological table of these associations is presented. A syntaxonomic scheme, a study of the vegetation structure is included.

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Psilotum nudum, Psilotaceae, Whisk Fern or Skeleton Fork Fern is reported for the first time in the Canary Island growing epiphyte and on garden soils of Tenerife and Lanzarote Islands.

Se describen dos nuevas asociaciones fitosociológicas de la clase Greenovio aureae-Aeonietea, de las montañas de Jandía en el sur de Fuerteventura, presentándose una tabla fitosociológica y un mapa de distribución mediante un Sistema de Información Geobotánica. Palabras clave: Greenovio aureae-Aeonietea, Fuerteventura, montañas de Jandía, nuevas asociaciones, vegetación rupícola, Sistema de Información Geobotánica.