Botanical Gazette 
A Montbly Journal Embracing all Departments of Botanical Science 
Subscription per year, $4.00 Single Numbers, 40 Cents 
The subscription price must be paid in advance. No numbers are sent after the expiration 
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FOREIGN AGENTS: 
Great Britain —-WM. WesLry & Son, 25 Essex Germany — GEBRUDER BoRNTRAEGER, Berlin 
St., Strand, London. 18 Shillings. SW. 46, Schonebergerstr. 17a. 18 Marks 
Vol. XXIX, No. 2 Issued February 20, 1900 
CONTENTS 
ere es THE DEVELOPMENT OF THE POLLEN GRAIN IN SYMPLOCARPUS 
DUS AND PELTANDRA UNDULATA (witH PLATES I AND II). &. AZ. Duggar 81 
A CONTRIBUTION TO THE LIFE HISTORY OF SILPHIUM. CoNnTRIBUTION FROM THE 
{uLt BoranicaL LABorAToRY. XVII (WITH PLATES I1I-X). Wiliam Dayton Merrell 99 
BRIEFER ARTICLES. 
AN IMPORTANT WoRK ON GARDEN Botany. Wilhelm Miller - . sie 134 
THE ae rae FOR PLANT MORPHOLOGY AND PuystoLocy— VAL MEETING. W. &. 
anong - . : : - 135 
si set ARVENSE i ma oa E.J. fill “ - - - =. hg’ 
A NEw VIOLET. Aven Neiso - - - - : - = A Pas 
OPEN LETTERS. 
Wuat Is Prunus insitriTiA? F. A. Waugh - - - - - - 144 
CURRENT LITERATURE. 
BOOK REVIEWS - i a 2 s - . 2 - - 145 
A » Sahel REV CLASSIFICATION OF BACTERIA. 
A VOLUME oF pedi eants SYLLOGE. 
NOTES FOR STUDENTS - - . - . - - - - 148 
NEWS A < Z . “150 
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