CONTENTS. 
1. REPORTS FOR THE YEAR 1891:— PAGE, 
a. Report of the Officers of the Board . . » » » «e+ 7 
b. Third Annual Report of the Director . ...... HU 
2. ANNIVERSARY PUBLICATIONS: — 
a. Second Annual Flower Sermon — 
By the Reverend Montgomery Schuyler . . » » «© + « 21 
b. Proceedings at the Second Annual Banquet of the 
Trustees of the Garden ..-. 2 «+ » « « .: 86 
c. Proceedings at the Second Annual Banquet to Gardeners 57 
3. SCIENTIFIC PAPERS: — 
a. Revision of North American species of Rumex — 
By William Trelease . . « + © © © © © «© «© © + U4 
b. The Yucca Moth and Yucca Pollination — 
By Professor Charles V. Riley. «© + « © «© «© © « + 9 
c. Notes and Observations :— 
Detail Illustrations of Yucca. . . « »« «© « « « « 159 
Agave Engelmanni,n.sp. . . . + + «© © «© © © + 167 
Parmelia molliuscula, Ach. . . 2 «© «© « «© «© « ~ 169 
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