335 



II. THE PREVENTION OF SAND OR DUST DRIFTING. 



As far as the checking of drift sand is concerned there may be 

 recommended the following native plants : 



Sesbauia tonientosa, a leguminous plant, prostrate and creeping 

 over large surfaces of sand which grows well at the beach or on 

 dunes farther inland. 



Heliotropum anomalum. 



Argyraea tiliaefolium {Pilikai), a stout and strong climber and 

 runner belonging to the Convolvulus Family. 



Zoia pungens, a species of grass already plentiful; very useful 

 in checking sand drift. 



Scaevola frutesccns (Naiipaka Kahakai). 



Of foreign plants the following will be found suitable to pre- 

 vent sand drifting: 



Mesembrianthem spectablile, Mesembrianthem aequilaterale, 

 Mescuibrianthem litorale (Ice plant). The latter two are em- 

 ployed extensively against sand drift and for the reclaiming of 

 land in Southern California. It grows easily from portions of 

 plants which can be secured readily. 



It is a difficult matter to recommend trees for the stopping of 

 sand drifts. In my opinion it is necessary first to check the drift 

 by low-growing plants such as have been recommended. 



The planting of species of Agave and Fourcroya will be found 

 useful; also Sanscz'iera and various succulent Euphorbia as E. 

 catimando. 



Of trees, mention may be made of Prosopis velutina, Zizyphus 

 jujuba, Erythrina spp. 



Especially recommended is Leptospennum laevigatmn. It is 

 extremely useful in arresting drift sand either at sea shores or 

 in sand deserts, and is also a splendid hedge plant. It is a native 

 of Australia, though seeds can be obtained from Southern Cali- 

 fornia. 



CalophyUiiui inopJiylluin, the native Kauiani, is a tree which 

 should be planted in groves along beaches and inland where there 

 is likely to be danger of sand drift. 



Terniinalia catappa may also be used. 



Melaleuca parviflora, useful as a sand stay. 



Myoporum humile is equally useful. 



III. THE REFORESTATION OF ERODED AND ARID AREAS ON SLOPES OF 

 MOUNTAIN RANGES AND ON PLAINS. 



Of certain native trees to be recommended for planting in the 

 dry or arid regions of these islands, it may be stated that nearly 

 all of them are extremely slow growers. 



Those recommended for planting are : 



Sapindus oahuensis (volunteers freely) ; 



Sapindus saponaria; 



Acacia Koaia. The Koaia of the natives, of which seeds can 

 be obtained from trees above KazuaiJiaeuka where it is plentiful. 



