1004 



not so infected turned yellowish-white and died in 

 three or four weeks. The plants from unsterilized 

 seeds produced leaves with many more bacterial knots 

 on them than did those from sterilized seeds which were 

 later artifically inoculated. In view of the fact 

 that these Rubiaceae with bacterial knot bearing leaves 

 occur in many parts of the tropics and that in India 

 at least the value of their leaves for manure has 

 long been recognized, and judging from the value of 

 the Leguminosae as nitrogen collectors, the suggestion 

 of Faber is well worthy of consideration, that we may 

 have in these tropical trees and shrubs, plants of 

 positive agricultural value for the tropical planter. 

 Even in Florida the value of the mulch formed by the 

 leaves of leguminous and other plants is keenly ap- 

 preciated by the best cultivators and it may be pos- 

 sible to find suitable small shrubs of Pavetta or 

 other Rubiaceae which will be worth while growing for 

 their nitrogen-fixing leaf bacteria in the orange and 

 avocado orchards of southern. Florida or wherever the 

 climate will permit of their cultivation." (David 

 Fairchild. ) 



Pistacia chinensis Bunge. (Anacardiaceae . ) 42823. 

 Seeds of Huang lien shu from Nanking, China. Presented 

 by Mr. John H. Reisner at the request of Rev. Joseph 

 Bailie, University of Nanking. A tall, deciduous tree, 

 strikingly ornamental, with large pinnate leaves, red 

 when young, changing to vivid green in summer and 

 flaming scarlet yellow in fall. Berries inedible. 

 Many trees previously introduced have succeeded in the 

 dry south west and an avenue has been planted at the 

 entrance to the Chico Field Station. 



Potentilla fruticosa vilmoriniana Komarow. (Rosaceae.) 

 42694. Plants from Paris, France. Purchased from 

 Vilmorin-Andrieux & Company. Introduced from China 

 by Mr. Maurice L. Vilmorin, this new Potentilla forms 

 a tufted shrub, very erect, a meter in height, with 

 silky very silvery foliage, and covered during the 

 whole season with pale sulphur yellow flowers, larger 

 than those of the species. Very suitable for massing 

 in a shrubbery border. 



Pyrus spp, (Malaceae.) 42779, 42796-42798. Seeds 



four species of pears from Madrid, Spain, and Leiden, 



Holland. Introduced for the work of the Office of 



Horticultural and Pomological Investigations. 42779. 



