Study of one of the few San Blas Islands (Panama) with intact vegetation indicates that the flora has a greater affinity with distant circum-Caribbean islands than with the nearby mainland. The San Blas coast of northeastern Panama is fringed by a series of small flat islands, few of them as long as 1 km, and few more than 1 km offshore. Nothing is known about the vegetation of the islands before they were settled by the Kuna Indians in the middle of the last century (Jaen, 1978). Today most of the islands are densely populated without a single trace of original plant life remaining. On 9 October 1978, we hired an outboard motor boat and visited a small island in the group that was uninhabited and appeared to have a large measure of its natural vegetation intact. The 34 species noted during this morning included two new to Panama and an assemblage of species more likely to be found on a flat limestone island in the northern Caribbean hundreds of miles away than on the mainland of Panama less than 1 km away. The island's location, 9014'N, 48001'45W, is midway between Isla Nustupo and Ailigandi, and it is approximately halfway along the San Blas coast between Porvenir, the district capital, and Puerto Obaldia at the Colombian frontier. It is only a few hundred meters from the mainland. This island is not marked on any maps we consulted, and we refer to it by the name given by our Indian guides, 'Ocoquili,' which refers to the coconut trees on it. Upon leaving the area later in the day, we persuaded our pilot to circle 'Ocoquili' and the photo shown here (Fig. 1) was tak-