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JAMAICA PLAIN 
ARNOLD ARBORETUM OF Harvarp UNIVERSITY 
Established: 1872. The principal collections of trees and shrubs 
were not planted until 1886. Area: 260 acres. 
Director: Charles Sprague Sargent (1872-1927). 
Supervisors: Oakes Ames (1928-1935); Elmer D. Merrill 
(1936- ) 
Serves as a public park. Open free, daily, from sunrise to sun- 
set. Source of income: Interest from endowment, special contri- 
butions, municipal appropriations for construction and mainte- 
nance of carriage drives and walks. Library: About 4100 bound 
volumes; 10,000 pamphlets; 17,000 photographs. Herbarium: 
About 390,000 specimens, representing the woody plants (only) of 
the world; Carpological collection 8000; Wood collection 4000. 
‘onservatories: As the arboretum includes only woody plants,. 
hardy in the climate of Jamaica Plain (near Boston), there are no 
plant houses except a small propagating house. Plantations: Sys- 
tematic. 
1. Arboretum. Stated by the authorities (in 1934) to contain 
the largest number of species of woody plants assembled in any 
one place in America. (More than 6500 species and varieties of 
trees, shrubs, and vines representing about 339 genera. 
2. Fruticetum. The Shrub Collection ‘is arranged in beds ten 
feet wide, with a total length of 7765 feet, and separated by grass 
covered paths five feet wide. In these beds the shrubs are planted 
in a single row and in botanical sequence, all the species of a 
genus being thus brought together. In this collection only those 
genera are included in which all the species are shrubs, while those 
genera which contain trees and shrubs, like Cornus, Syringa, Vi- 
burnum, Rhamnus, Rhus, Evonymus, Rhododendron, ete., are 
planted in other parts of the Arboretum and as near as possible 
to the other genera of their natural families. 
“ The object of this special Shrub Collection is to enable stu- 
dents, landscape-gardeners, and nurserymen_ to compare readily 
the different shrubs which are available for planting in the North- 
ern States; to make the collection as valuable as possible for this 
purpose only well-known hardy shrubs are included in it. Less 
hardy and all imperfectly known shrubs will be found in more 
sheltered and less conspicuous positions, where supplementary col- 
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