Mediterranean foggy desert geocomplex. 1. Xeromorphic shrubland & thicket: Nolana divaricata-Tetragonia maritima community. Succulent aero-halophile vegetation on coastal beach sand dunes. 2. Xeromorphic scrub: Skytanthus acutus communities. Deep coastal soils. 3. Foggy coastal hyperdesert: Copiapoa cinerea-Eulychnia breviflora tenuis community. Xeromorphic shrubland and thicket with cacti and succulents on granitic boulder stony soils. 4. Phreatophilic coastal scrub: Gypothamnium pinifolium communities. Topographic depressions with shallow temporal water tables 5. Desert open succulent shrubland: Caesalpinia angulicaulis-Eulychnia acida elata community. 6. Open phreatophile-xeromorphic shrubland: Skythanthus acutus-Balsamocarpon brevifolium communities. Temporal ravines with shallow seasonal water tables. 7. Open xeromorphic shrubland: Krameria cistoidea-Bulnesia chilensis communities. Desert zonal vegetation. 8. Desert open ravine shrublands: Atriplex atacamensis-Adesmia argentea community (on temporary arroyo beds) and Nolana sedifolia-Skytanthus acutus community (on recent low fluvial terraces). 9. Thorn woodland and shrubland: Geoffroea decorticans-Schinus molle community. Phreatophylle riparian on temporarily flooded allochthonous streams (arroyos). Graphic geobotanical interpretation based on our field transect data and cited references.