PROCEEIJINGS 



OF THE 



CALIFORNIA ACADEMY OF SCIENCES 



Fourth Series 



Vol. I, pp. 431-446 December 17, 1912 



EXPEDITION OF THE CALIFORNIA ACADEMY 



OF SCIENCES TO THE GALAPAGOS 



ISLANDS 1905-1906 



VII 

 NOTES ON THE LICHENS OF THE GALAPAGOS ISLANDS 



BY ALBAN STEWART 



Botanist to the Expedition and Instructor in Botany in the 



University of Wisconsin 



While acting as botanist to the recent expedition sent by 

 the California Academy of Sciences to the Galapagos Islands, 

 I made a considerable collection of lichens. I am not a lichen- 

 ologist in any sense of the word, and it is with some hesitation 

 that I approach a subject with which I have so little acquamt- 

 ance However, as I made a number of notes on the subject 

 while collecting there, and as very little has been written on 

 the general distribution etc. of the Licheucs of these islands, 

 it seems worth while to publish those notes, along with a list 

 of the species which were secured. This list is probably far 

 from complete, for I was more interested in collecting and 

 studying the distribution of the vascular plants; and it was 

 often the case that lichens were carefully collected only where 

 no vascular plants in good condition were to be found, as 

 was sometimes the case when the lower islands were visited 

 during the dry season. Notwithstanding the rather neglectful 



December 14. 1912 



