carried out on South Island. Below is a short summary of the vegetation of each large island and the other islet groups as observed in 1965. South Island. Old Cocos groves cover the greater portion of South Island. Interspersed in these old groves are thickets of Morinda often associated with Ipomoea tuba. In some open areas where Cocos trees have died or been felled by natural causes the grass Lepturus repens forms a nearly closed stand with Ipomoea. A Suriana - Lepturus zone forms a fringing association around South Island. On the north side bordering the lagoon the Suriana forms a dense continuous shrub border (see Fig. 4.). On the west, south and east sides the Suriana shrubs are taller, less compact and more scattered (see Fig. 3.). Patches of Lepturus are scat- tered about often extending well outside and beyond the Suriana zone toward the high tide line. Nake Island. Like South Island Nake has been planted to Cocos. The groves extend the entire length of the island. (See Fig. 7 and Fig. 8.) In open patches of the interior and along the edge of the Cocos stands occur associations of Pandanus, Morinda and Tour- nefortia. Along the northeast side an almost continuous riming stand of Tournefortia lines the area between the groves of Cocos and the open sandy beach with scattered clumps of Lepturus and the ubiquitous Boerhavia repens. Some of the older Tournefortia trees may reach almost 3 meters high. In damp muck areas under the Cocos groves Tacca is found in scattered groups. Long Island. On the north end of Long Island are clumps of Morinda and Cordia. As one walks south along the lagoon edge of the island Pisonia trees are observed with Cordia and Morinda. (See Fig. 6.) On both sides of the island Tournefortia forms a fring with open areas supporting Lepturus in scattered bunches. On the south end of the island occurs an open area among Tourne- fortia shrubs. Here in open sand was found the only Tribulus to be found on the entire atoll. On the north side lesser frigate-