92 
TREES AND SHRUBS 
We are indebted to the Arnold Arboretum, through Mr. W. H. 
Judd, for plants or cuttings of a number of rare species. Other 
plants were obtained from the extensive nursery of the Boyce 
Thompson Institute, from the Estate of Mr. Anton Hlodenpyl, and 
others. “A number of plants were imported from nurseries in 
Japan, Germany, England, and Ireland. Also, plants have been 
obtained from seeds through the International Seed Exchange. 
We have made some exchanges with the Sanford Arboretum, in 
Tennessee. The additions have been in many cases trees and 
shrubs of doubtful hardiness, which have been placed in protected 
parts of the nursery. Though some of these have lived through 
the several mild winters, which we happen to have had in succes- 
sion, they are hable to die in a severe winter. Among them may 
be mentioned: Choisya ternata, [:phedra distachya and E. procera, 
Loropetalum chinense, Meratia praccox, Marsdenia erecta, Meli- 
osma myriantha, Ruscus aculeatus, Tetracentron sinensis. Some 
special provision for the semi-hardy species where they could be 
protected and where they might be seen by the public, would be 
very desirable. 
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Fic, 9. Diagram showing arrangement of Forsythia and other genera at 
the south edge of the Olive Family group. The entire Systematic Section of 
the Garden is mapped in a similar way. The size of the circles represents 
the comparative spread of the shrubs. The data include name, date of ac- 
cessioning, and nursery or other source. 
