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olive, pomegranate, logwood, durian, mango, sugar cane, avocado 
(so-called “ alligator pear”), West Indian and other rubber plants, 
banyan, religious fig of India, and numerous others. 
It may be of interest to teachers that the nine extant genera of 
cycads are now represented in House 12. To reach the Cycad 
House take the first door to the left after entering the central or 
Economic House and pass through to the end house. 
The Conservatories are open April 1 to October 31, 10 a.m— 
4:30 p.m. (Sundays, 2-4:30) ; November 1 to March 31, 10 a.m.- 
4+ p.m. (Sundays 2-4) 
Herbarium 
The Garden herbarium consists at present of about 200,000 
specimens, including phanerogams, ferns, mosses, liverworts, 
lichens, parasitic and other fungi, algae, and myxomycetes. This 
collection may be consulted from 9 a.m. until 5 p.m. by those inter- 
ested, and specimens submitted will be gladly identified. 
Library 
The rapidly growing library of the Garden comprises at present 
more than 17,000 volumes and more than 13,0090 pamphlets. This 
is not a circulating library, but is open free for consultation to all 
persons daily (except Sundays and holidays) from 9 a.m. until 
5 p.m. (Saturdays, 9 to 12). More than 900 periodicals and 
serial publications devoted to botany and closely related subjects 
are regularly received. These include the transactions of scien- 
tific societies from all quarters of the globe; the bulletins, mono- 
graphs, reports, and other publications of various departments of 
the United States Government, as well as those of foreign govern- 
ments, and of all state agricultural experiment stations and agricul- 
tural colleges; the publications of research laboratories, universi- 
ties, botanic gardens, and other scientific institutions of the world, 
as well as the files of independent journals devoted to the various 
phases of plant life. The library is specially rich in publications 
of foreign countries and has a growing collection of incunabula 
— 
and other pre-Linnean works. 
Bibliographical assistance is rendered to readers by members of 
the Library staff. 
