2 PLANT MATERIAL INTRODUCED 



Attention is called to Macadamia. term folia (No. 67883) and also 

 to the attempt to introduce a related species with a larger nut, M. 

 prealta (No. 67882). The horticultural possibilities of M. temifolia 

 make it appear desirable to encourage the planting of this species 

 as specimen trees for homey ar'ds and also for avenue and street 

 purposes in the warmer portions of the country. In this way su 

 perior horticultural varieties may be selected from such seedling 

 plantings. M. temifolia is a very fine specimen and avenue tree, 

 and the fact that it is an evergreen makes it serviceable in places 

 where such trees are preferred. Thin-shelled varieties are known 

 to exist in Australia as individual trees, and to find such a variety 

 is one of the objectives of large plantings in this country. Attention 

 perhaps should be called to the fact that the area having climatic 

 conditions suitable to species of Macadamia is limited and somewhat 

 more restricted than in the case of citrus plants. However, more 

 hardy strains than the ones already introduced may yet be found. 

 While M. prealta is less well known than M. temifolia and not yet 

 established in the United States, its large nut makes it seem worth 

 special attention by further introductions and subsequent testing. 



The introduction of Pentzia incana under No. 67880 should again 

 call attention to this shrub as a possible asset to the dry range area 

 of the southwestern United States from the Panhandle of Texas 

 south to the Rio Grande and west to the Pacific coast. It is the well- 

 known karoo bush of the pasture lands of South Africa and affords 

 the best dry-land reserve feed in that region. It is essentially a sheep 

 browse and is reputed to be responsible for the fine quality of wool 

 shipped from Africa. If it can be successfully established in our 

 Southwest it should be a great feed insurance for drought years. 



Other plants in this inventory that should be specifically men- 

 tioned on account of the results with previous introductions or their 

 promise as indicated by their behavior in their original homes are 

 Telopea speciosissima (No. 68912), Calopogonium mucunoides (No. 

 68845), Arachis nambyquarae (Nos. 68830 and 68831), Populus maxi- 

 mowiczii (No. 68170), and Myoporum sandwichensis (No. 68157). 

 The Myoporum is suggested for special testing in windy and ex- 

 posed areas along ocean fronts where a mild climate prevails. 



The botanical determinations of these introductions have been 

 made and the nomenclature determined by H. C. Skeels, and the 

 descriptive matter has been prepared under the direction of Paul 

 Russell, who has had general supervision of this inventory. 



Knowles A. Rterson, 

 Senior Horticulturist, in Charge. 



Office or Foreign Plant Introduction, 



Washington, D. C, July 16, 1928. 



