323 
lections of most of the prominent genera of shrubs are maintained. 
“Three sides of the shrub ground are surrounded by a trellis on 
which the vines of the collection are trained, all the species of each 
genus being planted together.” 
3. Hawthorn collection. “ About 1300 species, forms, and va- 
rieties of this genus are now represented in this collection. The 
plants were nearly all produced at the Arboretum, from seeds 
carefully gathered from the individual trees which served as the 
types from which the species were described. The plants are in 
square beds, and several individuals of each species are planted 
together ; then as these grow they are reduced to one or two plants 
of each variety. Diagrams of each bed are kept on cards, and 
the name, history, position, and final distribution of each indi- 
vidual are recorded.” 
4. Pinetum, containing the pines and other Gymnosperms. 
Publications: Shaw, George Russel, The pines of Mexico, Boston, 
. Wilson, E. H., Vegetation of Central and Western 
China. (500 photographs), 1911. The Bradley Bibliography, 
a guide to the literature of woody plants published before the 
beginning of the twentieth century. Plantae Wilsonianae, an 
enumeration of the woody plants collected in western China, 
etc. A guide to the Arnold Arboretum (with map). Bulletin 
of Popular Information—issued during spring and autumn, 
about 12 numbers per year. $1.00 per year. Journal of the 
Arnold Arboretun—Quarterly. Contributions from the Arnold 
Arboretum—issued at irregular intervals. The Genus Pinus. 
Catalogue of the Library of the Arnold Arboretum. The Cher- 
ries of Japan. The Conifers and Taxads of Japan. The For- 
est Trees of New England. 
Note: See also Cuba: Soledad (Cuban branch of Arnold Ar- 
boretum ). 
LEXINGTON 
Tue Lexincton Boranic GARDEN 
93 Hancock St. 
Established: 1930. Area: 10 acres. 
Director: Stephen F. Hamblin (1930— Ne 
