112 PROCEEDINGS OF THE AMERICAN ACADEMY 



tlie palm, which is frequent in the southern canons, growing to a height 

 of forty feet, and bearing large clusters of edible fruit. 



To conclude, it is apparent, from all that has been said, that this little 

 flora as a whole is to be considered a part of that of California, as dis- 

 tinct from the flora of Mexico. It may be inferred also that it has 

 not been to any great extent derived from California by any existing 

 process of conveyance and selection, but that it is rather indigenous to 

 its present locality. Moreover, while it would indicate a connection at 

 some period between the island and the mainland to the north, yet the 

 number and character of the peculiar species favor the opinion that 

 they are rather a remnant of a flora similar to that of California, which 

 once extended in this direction considerably to the southward of what 

 is now the limit of that flora upon the mainland. And, finally, the 

 presence of so many South American types suggests the conjecture 

 that this, and the similar element which characterizes the flora of 

 California, may be due to some other connection between these distant 

 regions than'any which now exists, and even that all the peculiarities 

 of the western floras of both continents had a common origin in an 

 ancient flora which prevailed over a wide, now submerged area, and of 

 whose character they are the partial exponents. 



II, List of a Collection of Plants from Giiadahtpe Island, made hy 

 Dr. Edward Palmer, with his Notes upon them.* 



1, Ranunculus hebecarpus. Hook. & Arn. Abundant on warm 

 slopes in the middle of the island, 



2, Crossosoma Californicum, Nutt. A shrub two or three feet 

 high, in the crevices of cliffs overhanging the canons in the middle of 

 the island. Only nine were found, out of reach of the goats, and 

 accessible only by the aid of a rope. In flower, February 10; petals 

 soon falling ; seed ripe, April 20, 



3, EsciisciiOLTZiA Californica, Cham.,var. nvrECOiDES, Gray, 

 Only at the south end in ravines, and in the middle of the island on 

 level ground ; apparently not eaten by goats, A form with smaller 

 flowers has been found on rocky heights in the middle of the island. 



* The determinations of the Gamopetahc of the collection were made entirely 

 by Dr. Asa Gray. The Mnsci were referred to Mr. Thomas P. James, and 

 the Ilcpatkce to Mr. Austin. Acknowledgment is made, in connection with a 

 few species, of assistance received from other authgrities. The numbers are 

 those under which the collection was distributed. 



