Vol. 2 July, 1902 No. 7 



TORREYA 



A Monthly Journal of Botanical Notes and News 



EDITED FOR 



THE TORRE Y BOTANICAL CLUB 



BY 



MARSHALL AVERY HOWE 



CONTENTS 



The Origin of Species by Mutation [concluded): D. T. -MacDougai,..'. 97 



A Key to the North American Species of Russula — -i : F. S. Eari.e 101 



Notes on the local Flora : Edward W. Berry K 103 



Notes on two parasitic Plants: S. B. Parish 105 



Reviews 



Lloyd's Comparative Embryology of the Rubiaceae : W. A. Cannon 106 



Campbell's University Text-Book of Botany: Luciex M. Underwood toS 



Proceedings of the Club: Edward S. Burgess in 



News Items 112 



Published for the Club 



At North Queen Street, Lancaster, Pa. 

 by The New Era Pkinting Company 



