604 A NATURALIST IN THE PACIFIC 



between the Drepanid and the Tree-Lobelia, that Mr. Perkins finds here 

 in part the cause of the development of the most remarkable forms of 

 the birds. The botanist, also, would not dissociate the plants from this 

 conclusion. There would be every reason to look for abnormal growth in 

 birds and plants when the bird depends on the flower for its food, and the 

 flower is dependent on the bird for its pollenisation. It is through such 

 guises that the zoologist and the botanist have to penetrate when establish- 

 ing the systematic affinity. 



NOTE 8 1 



ON THE VERTICAL RANGE OF SOME OF THE MOST TYPICAL AND MOST 

 CONSPICUOUS OF THE PLANTS IN THE FORESTS ON THE HAMAKUA 

 SLOPES OF MAUNA KEA, HAWAII 



During a descent of this mountain on its north side to near Ookala, 

 the conditions were unusually favourable for recording the range of altitude 

 for some of the plants easily recognisable. 



Acacia koa began at 6,700 feet, and extended down to 2,300 feet. 



Rubus ("akala") began at 6,500 feet, and extended down to 2,500 

 feet. 



Cheirodendron (" olapa ") began at 6,400 feet, and extended down to 

 2,200 feet. 



Cyanea, a lobeliad growing on trunks of tree-ferns, began at 4,000 feet, 

 and extended down to 2,300 feet. 



Freycinetia began at 3,850 feet, and extended down to 2,000 feet. 



Asplenium nidus began at 2,800 feet, and extended down to 2,200 

 feet. 



Aleurites moluccana began at 1,800 feet, and extended down to 

 50 feet. 



Metrosideros polymorpha, ranging through all the zones. 



NOTE 82 (page 416) 

 ABORIGINAL WEEDS l 



(Found by Captain Cook's Botanists, Banks, Solander, the Forsters, Nelson, &c., in the 



Pacific Islands, 1768-80) 



1 Seem ann is the principal authority, the results of his examination of the old collections being given 

 in his Flora Vitiensis. Species regarded by Hillebrand as indigenous in Hawaii or as existing in that 

 group at the time of its discovery by Cook are indicated by H in the second column. 



