APPENDIX 557 



is a frequent intruder as well as the recently introduced Algaroba tree 

 {Prosopis dulcis). Acacia Farnesiana also extends inland, covering entire 

 large areas and forming in :he Waianae valley extensive thickets im- 

 penetrable for the cattle. It occupies great districts near the coast in 

 different parts of Oahu, and with Hibiscus tiliaceus is to be found far 

 inland. The cattle are active dispersers of its seeds. (See Note 30.) 



True beach plants are infrequent at the mouth of Pearl Harbour, 

 although the coast is well suited for them. Here I found Heliotropium 

 anomalum, H. curassavicum, Jacquemontia sandwicensis, Lipochaeta 

 integrifolia (a true beach plant), Herpestis Monnieria, &c. Batis maritima 

 occurs in one or two localities around Oahu, but it is, according to 

 Hillebrand, of recent introduction. 



NOTE 30 (page 58) 

 THE BEACH-DRIFT OF THE HAWAIIAN ISLANDS 



It was pointed out by Dole long ago in one of the Hawaiian Club 

 Papers (1868) that the existing currents bring to this archipelago only huge 

 pine logs from Oregon, but no tropical fruits ; and Hillebrand (p. xiv.) refers 

 to the driftwood of pine logs from the north-west coast of America, 

 stranded on the shores of these islands. This drift seems to collect in 

 quantity in particular localities, as on the south-east coast of Hawaii 

 between Honuapo and the Kalae promontory (especially on the Kamilo 

 beach near Kaluwalu) and on the east coast of Oahu ; and probably 

 there are other favourable localities for catching the drift on the northern 

 shores of Maui and Molokai. 



It was on the south-east coast of Hawaii (on the beach at Kamilo and 

 on the eastern side of the Kalae promontory) that this drift came 

 particularly under my notice. Here the logs are stranded in abundance, 

 in sufficient quantity, in fact, to build a town, and they were employed for 

 building purposes by the manager of the neighbouring sugar-cane plantation. 

 Several of the logs are of huge size, as much as 4 feet in diameter ; and 

 they are known locally as " white cedar " and " red cedar," and character- 

 ised as Oregon timber. Some of them are extensively burrowed by the 

 " teredo " and other boring mollusks. Others recently stranded are 

 covered with barnacles (Lepadidae), whilst others that have lain long on the 

 beach are bare.* I have seen these logs occasionally washed up at 

 Punaluu and at different places on the lava-bound Puna coast. They 

 apparently first strike the Puna coast, and are drifted along until they 

 become embayed near the Kalae promontory, and ultimately stranded. 

 Mingled with them on the beaches Pandanus trunks occur in number ; 

 they evidently hail from those parts of the Puna coast where Pandanus 

 forests prevail, and thus they indicate the direction of the drift on the 

 coast of this island. In places there was a considerable amount of small 



