Shrub to 1.8 meters near edge of islet, east side, islet northeast of South Island, No. 3220; shrub 1.5 meters high along lagoon shore, edge of water, South Island, No. 3279. Collected by Dixon. See Figs. 3 and 4. Euphorbiaceae Phyllanthus amarus Schum. and Thonn. Herb to 4 decimeters, common on the north side of South Island, No. 3283. Collected by Dixon as P. niruri L. Convolvulaceae Ipomoea pes-caprae ssp. brasiliensis (L.) Van Ooststr. Stems to 7 meters long, in fruit, near copra shed, north shore, South Island, No. 3281. Only one plant seen on the atoll. A new record for Caroline Atoll. Ipomoea tuba (Schlecht.) Don Trailing vine, white flowers, common, stems to 6 meters long, South Island, No. 3228; Nake Island, No. 3242; trailing on Tournefortia, Long Island, north end, No. 3251; climbing over Morinda and Cocos, stems to 25 meters, South Island, No. 3293. Boraginaceae Cordia subcordata Lam. Tree to 4 meters, near lagoon, South Island, No. 3213; tree to 3 meters high on interior of islet, in coral rubble, about 15 meters above high tide line, second islet south of Nake Island (west side), No. 3228; tree to 4.5 meters high, orange flowers, common on interior of islet, Long Island, north end, No. 3246; fourth islet north of Bird Islet, No. 3261; tree to 4 meters, at edge of water, north shore along lagoon, South Island, No. 3261. Collected by Dixon. See Fig. 5. C4-grove of Cordia trees Nake Is. Heliotropium anomalum H. and A. In gravel of outer beach, islet northeast of South Is- land, No. 3222; clumps to 1.2 decimeters high, in exposed