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REPORT OF THE ASSISTANT SUPERINTENDENT OF FORESTRY, 



MARCH, 1921. 



Honolulu, Hawaii, March 31, 1921. 



Superintendent of Forestry, 

 Honolulu, T. H. 



Dear Sir: 



I respectfully submit the following statement of my activities during thc' 

 month of March, 1921. The entire month was spent on the island of Oahu, 

 either in the office or on various field trips. 



MAPS AND HEEBARIUM. 



Several days were devoted to a thorough overhauling of the file of forest 

 reserve maps, and thus far one complete set of blueprint maps of the 

 reserves on Oahu has been assembled and mounted in loose-leaf book covers 

 for ready reference. It is planned to mount in this manner a complete 

 set of maps of all forest reserves in the territory as one step in the prepara- 

 tion of a complete working plan for all territorial forest reserves. 



A number of additions were made during the month to the office collec- 

 tion of herbarium specimens of forest trees, including both native and 

 imported genera. 



IPIL-IPIL VERSUS HILO GRASS. 



In company with the Superintendent I spent two days in upper Nuuanu 

 Valley initiating an experiment to determine the efficacy of ipil-ipil in over- 

 coming Hilo grass. Ipil-ipil or haole kosi(Leucaena glauca) is a small tree, 

 native of tropical America, which is used effectively in the Philippines to 

 kill out cogon grass. In our experiment the seed was sown broadcast in 

 various quantities over measured plots in which the surface had been vari- 

 ously prepared, viz., grass undisturbed, grass burned, soil plowed after 

 removal of grass. The effort w^ill be to obtain a sufficient catch of ipil-ipil 

 to shade out completely the Hilo grass. Of the adaptability of the tree 

 there is no question, for it is already vigorously established in Makiki 

 Valley and in many other places in the islands where it is commonly known 

 as * ' Koa haole ' ' or w^hite man 's koa, from the fact tliat its foliage and 

 seed-pods somewhat resemble those of the true koa. In Hawaii it is a 

 very prolific seeder and spreads rapidly by natural reproduction. 



REFORESTATION DEMONSTRATIONS. 



On March 6 I accompanied the official party of some twenty members 

 of the Legislature, headed by President Atkinson of the Board, and the 

 Superintendent of Forestry, on a visit to the Waianae-kai Forest Reserve, 

 Oahu. Here were demonstrated the benefits in the way of steady stream 

 flow obtained by the sugar plantation in the "Waianae Valley as a result of 

 the rigid forest protection and extensive forest planting carried on for a 

 number of years in the foothills above the plantation. 



On the 9th, Mr. William Crosby, forester in the Philippine service, en 

 route to the mainland, stopped a day in Honolulu. I took him over the 

 Round Top-Tantalus Drive to see the planted Koa and Eucalyptus forests 

 and the Makiki Nursery, then up Nuuanu Valley to the ipil-ipil plots and 

 other' places of interest. He was surprised and very favorably impressed 

 with the extent of the work in forestry being done here. 



