PROCEEDINGS 



OF THE 



CALIFORNIA ACADEMY OF SCIENCES 



Fourth Series 



Vol. I, pp. 7-288 January 20, 1911 



EXPEDITION OF THE CALIFORNIA ACADEMY OF 



SCIENCES TO THE GALAPAGOS 



ISLANDS, 1905-1906 



II 



A BOTANICAL SURVEY OF THE GALAPAGOS ISLANDS 



BY ALBAN STEWART 

 Botanist to the Expedition 



CONTENTS 

 Plates I-XIX 



PAGE 



Introduction 8 



Account of the Species of Vascular Plants .... 11 



Botanical Regions 206 



General Features of the Flora 211 



Ecological Factors 219 



Origin of the Galapagos Islands 233 



Origin of the Flora 239 



Bibliography of the Botany of the Galapagos Islands . . 246 



Index 249 



Explanation of Plates 254 



January 14. 1911 



