336 



Osmantlius sandzvicensis, the Pua or Olopua, a very common 

 tree species of Sidero.vylon. 



Sophora chrysopliylla, the Maiiiaiii, will grow well in those re- 

 gions. It is common on the lava flows at low elevations, also in 

 dry gulches on Lanai. 



Myoporum sandzvicense, the Naio. 



Erythrina iuonosperma, the IVilizvili. 



Of foreign trees, the following may be recommended : 



Erythrina indica, Erythrina umhrosa, Erythrina arborescens, 

 Erythrina caffra, Erythrina fusca, Erythrina tomentosa, Eryth- 

 rina corallodendron, ErytJirina ovalifolia. 



Azadirachta indica, the Nim or Neem tree of India; a very im- 

 portant tree in India and one of the widest spread trees in that 

 country, especially through the arid regions. 



Melia azedarach, already naturalized on Kauai. It is not such 

 a useful tree as the former ; it is spread easily by birds and when 

 growing in groves is not to be despised. 



Alectryon excehum, a native of New Zealand and a relative 

 of the Hawaiian Alectryon niacrococcus, which grows in the low- 

 er Waianaes. The former is a handsome tree and well establish- 

 ed in Southern California where seeds can be obtained. Seed- 

 lings in the College of Hawaii aboretum. 



Various species of Callistemon or bottle brushes. Seeds from 

 California are growing at the College. Various species of Mela- 

 leuca may also be grown. Tristania, large trees of the dry re- 

 gions, seeds obtainable in California, seedlings growing at the 

 College of Hawaii. 



An effort should be made to introduce various Acacias from 

 the arid regions of Africa. Acacia arabica is already in Honolulu 

 bearing seeds. Acacia giraffae or A. Seyal. This species forms 

 woods of enormous extent in the Black Mountains of Africa in 

 dry, stony places. 



Acacia arabica deserves special mention and the following may 

 be stated : 



The Gum arable, Acacia arabica, should be planted in our arid 

 regions ; it prefers a dry soil and it is never leafless. It can be 

 grown as a forest crop in any of the dry regions in the Islands. 

 The wood is excellent as fuel and will well compete with Kiazve. 

 It yields a valuble timber while luxuriating in the poorest waste 

 lands. It is an excellent tree for poor soil and exposed situa- 

 tions, and continues to flourish during long periods of drought. 

 It is one of the most useful trees for broad-cast sowing, as the seed 

 germinates readily and is hardy and independent of rain. It can 

 be planted as a thick belt along roads to form a roadside avenue, 

 which would produce a vast amount of fodder. The seeds em- 

 bedded in a nutritious pod would be spread by cattle quite as 

 easily as the algaroba or kiawe. It is of rapid growth and as it 

 requires no water and improves sterile tracts of land, it should 

 by all means be given a fair trial. • The tree will live up to a hun- 

 dred years or even more. There is one tree of this species in 



