CONTENTS. 
PAGE. 
1, REPORTS FOR THE YEAR 1899: — 
i. Report. of the Officers.of.the Board)... is 
b. Eleventh Annual Report of the Director ..... . 12 
_ 2. SCIENTIFIC PAPERS: — 
a. A disease of Taxodium distichum known as peckiness, 
also a similar disease of Libocedrus decurrens known 
as pin-rot — 
By Hermann von Schrenk . .. . ees | 
b. Agave expatriata and other Agaves Panaiee a2: in the Wash- 
ington Botanic Garden in 1898 — 
ee a = are reer oes 
c. A revision of the American species of Euphorbia of the 
section Tithymalus occurring north of Mexico — 
By. 8. Fe a ihe bose ge 85 
d. Revision of the species of Lophotocarpus of the United 
States; and description of a new species of Sagittaria — 
By. Jared. G... 8nith-<y. eee Se 
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