Vol. IV. Part 24. 
PIT'TONIA. 
A SERIES OF BOTANICAL PAPERS 
EDWARD L. GREENE, 
Professor of Botany in the Catholic University of America, 
WASHINGTON, D. C. 
JANUARY, I9OI. 
CONTENTS: 
PAGE 
TARAXACUM IN NORTH AMERICA : : 
NEW OR NOTEWORTHY SPECIES XXVIII, ‘ s : 233 
STUDIES IN THE CoMPosrTJE— VIII, : : . 242 
1. Type of the Bidentidese, . : : . 242 
2. Sketch of the History of Bidens, : à : . 243 
3. Identity of Bidens frondosa, Lin : 246 
4. Sketch of the History of Bidens « cernua, Linn. « . 261 
5. American Analogues of Bidens cernua, Linn., : 252 
6. Segregates of Bidens chrysanthemoides, Michx., . 262 
7. Generic Rank for Bidens Beckii, Torr., ; 270 
8. Some New Eupatoriace:e, à : . 272 
9. Certain Species of Animas, 280 
Price, Fifty Cents. 
Payor, UPHAM & Co. .San Francisco: WILLIAM WESLEY & SON, London. 
