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 artiflcally 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 Paber 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 
Fair child.) 
Pistaeia ehinensis 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 frutieosa 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 (Malaceae.) 42779, 42796-42798. Seeds 
of four species of pears from Madrid, Spain, and Leiden, 
Holland. Introduced for the work of the Office of 
Horticultural and Pomoldglcal Investigations. 42779. 
