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CONTENTS 





Page 



1. Reports for the Year 1904 



a. Report of the Officers of the Board ........ 7 



b. Sixteenth Annual Report of the Director 13 



2. Scientific Papers: — 



a. The identification of Walter's grasses. — 



By A. S. Hitchcock 31 



6. A systematic revision of the genus Cereus Mill. — 



By Alwin Berger 57 



c. The North American species of Fuirena. — 



By B. F. Bush 87 



d. Two new Texas Tradescantias. — 



By B. F. Bush 100 



e. New plants from Missouri. — 



By K. K. Mackenzie and B. F. Bush 102 



/. A disease of black oaks caused by Polyporus obtusus Berk. — 



By Perley Spaulding 109 



g. Glassy fir. — 



By Hermann von Schrenk 117 



h. On the occurrence of Peronospora parasitica on cauli- 

 flower. — 



By Hermann von Schrenk 121 



i. Intumescences formed as a result of chemical stimula- 



tion. 



By Hermann von Schrenk 125 



j. A disease of cauliflower and cabbage caused by Sclero- 

 tinia. 



By George Grant Hedgcock H9 



k. A disease of cultivated Agaves due to Colletotrichum. — 



By George Grant Hedgcock 15S 



Z. Vegetative structure of Mesogloia. — 



By A. C. Life 157 



m. Illustrations of a u strangling" fig tree. — 



By William Trelease 161 



n. The dehiscence of anthers by apical pores. — 



By J. Arthur Harris . 167 



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