C.R. Long 1964 surface. Sida and Portulaca are scattered about in mixed clumps or alone. The vegetation here reflects the disturbance of the past. The loss of cover and the making of new substrates shows vividly the time required for the vegetation associations of low, dry islands to become established. On the west face of one guano mound Fleurya ruderalis was collected - stems very succulent. The plants are shallow rooted. Perhaps during heavy rain the guano soils absorb a large amount of the rainfall and/or the depressions are filled. This latter source of water would supply moisture to the sides of the guano piles. Permanent markers - No. 1 - placed in coral gravel ridge north of the larger guano pit. The cover in this area is approx. fifty percent with Sida, Portulaca and Boerhaavia associated. The site is nnw of the Enderbury light. In the areas between the rubble piles on the west end there are good stands of the Portulaca - Boerhaavia association. These areas have gravel on top with a mixture of sand and guano below forming a fine soil. The best stands are in spots with some protection from the prevailing wind. Permanent marker - No. 2 - placed in fine coral gravel between small rubble mounds - about one-half mile due north and slightly east of the large guano mound on the west side of the island. Here is found a Port- ulaca-Boerhaavia association. Four golden plovers observed on the ground in this area. On the north' side near the beach are a series of deep gouges - approx. ten to twenty-five feet deep. Guano is found on the bottom with small plants of Sesuvium and some Sida seedlings. At the north raised end of the deepest gouge are Portulaca and Sida with trailing Triumfetta on the rocky (with sand pockets) sides of the gouge. On the top of the slope on the north end are found Portulaca, Boerhaavia, Sida and some scattered clumps of Lepturus. On top near the beach one finds Triumfetta alone. This area particularly in the distribution of Portulaca and Lepturus reflects the importance of substrate and topography in the distribution of species on low dry islands. I walked along the north beach to the east end and found Triumfetta, Boerhaavia, Lepturus and Sida- cover is very sparse. I suspect Portulaca also present but there was little light left. * see vegetation map of Enderbury Island constructed by C.R.Long from observations and field notes taken between July 15-17, 1964.