IP o 8 1 e i i a 153 



dish layers on stones in the stream. 

 With it were tiny, blue-green cushions 

 of a Tolypothrix and a Nostoc. When 

 the falls were reached we were in- 

 structed by our companions to make an 

 offering to the goddess of the waterfall, 

 which we did in true Hawaiian style, 

 building a tiny pile of stones on one 

 or two large leaves, and so we made 

 ourselves safe from falling stones, which 

 otherwise, we were assured, would strike 

 us. On the sides of the cliff washed by 

 the spray of the waterfall, among mosses 

 and liverworts, was found what seemed to 

 be a Nostoc, but which turned out to be 

 Aphanothece nagelii. After a hard up- 

 ward scramble among Lantana patches 

 and on the exceedingly slippery dried 

 grass of the mountain side, we were 

 taken to view a sandalwood tree, said 

 to be the only one left on the island of 

 Oahu. Some of the roots, twigs, berries 



