462 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1917. 



the two endemic genera Phyllostegia and Stemogyne. Entirely ab- 

 sent from the islands are the mangroves, those swamp trees so char- 

 acteristic of most tropical shores. 



Taking everything into consideration, the American botanist will 

 be amply repaid for all the time and effort expended in visiting the 

 Hawaiian Islands. He will be brought in contact not only with a 

 new plant world, but with many curious and remarkable natural 

 phenomena. He will be able to prosecute his researches under un- 

 usualty pleasant and favorable conditions, a salubrious climate, help- 

 ful and sympathetic inhabitants, and an absence of those banes of 

 the botanical collector, pestiferous insects and poisonous reptiles. 



