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No. 46. Some aspects of desert vegetation, by Dr. D. T. 
MacDougal. 
No. 47. Anatomy and physiology of Baccharis genistel- 
locdes, by Miss E. M. Kupfer. 
No. 48. Mutations in plants, by Dr. D. T. MacDougal. 
Preservation of Native Plants. 
Interest in the subject of the protection of wild flowers and 
of natural woodlands has been increased by the aid of the 
income of the fund of $3,000 established in 1901 by the 
Misses Olivia E. and Caroline Phelps Stokes; a portion of 
the income was used in defraying the expenses of a series of 
lectures delivered in ten eastern cities in the spring by Mr. 
C. L. Pollard, Secretary of the National Society for the 
Preservation of Wild Flowers; one of these lectures was 
delivered at the Garden. Another part of the income was 
used for the distribution of printed documents referring to the 
topic. 
The Scientific Directors have authorized for 1904, the 
expenditure of the income along three lines: (A) Payment 
for prize essay on wild flower preservation; (B) arrange- 
ments for additional lectures; (C) the printing of notices to 
be posted where found desirable and practicable. 
Reports Appended. 
I submit, also, reports by the Curator of the Museums and 
Herbarium, the Curator of the Economic Collections, the 
Director of the Laboratories, the Librarian, the Head 
Gardener, the Superintendent of Buildings and Grounds, 
and a schedule of expenditures under appropriations by the 
Board of Managers. 
Respectfully submitted, 
N. L. Britton, 
Director-in- Chief. 
