312 



PHYSICAL HISTORY OF MAN. 



coast, was found to be cultivated with success at the Kooskoosky 

 station. 



Daucus carota, the carrot, was seen under cultivation ; together with 

 Ltjcopersicum esculentum, the tomato ; 



Brassica oleracea^ the cabbage ; and various other garden vegetables. 

 Bidens trijida, had become an abundant weed ; growing with 

 Campanula amplexicauUs, in the irrigated and cultivated ground ; and 

 accompanied by 



Polygonum persicaria : and these three plants, were not met with in 

 any other part of Oregon. 



At the Bay of San Francisco, the introduced plants, had arrived 

 by a third route, that of Mexico: and a variety of species, (mostly 

 European,) have become naturalized; notwithstanding that cultivation 

 is on a very limited scale. I shall notice only the five following: 

 Mirabilis jalapa, seen cultivated as an ornamental plant. 

 Anagallis arvensis, naturalized abundantly; but not extending beyond 



the environs of the Bay. 

 Ei'odium, probably a European species, and introduced with cattle. 

 Perhaps the same, with one seen naturalized at the Kooskoosky 

 station; and also in Chili. 

 Avena saliva, the common oat, has now overspread the environs of the 

 Bay; in some instances, taking exclusive possession of the prairie. 

 Mr. Brackenridge, in coming with the land-party from Oregon, 

 " first met with the oat in the valley of the Sacramento, about one 

 hundred and fifty miles above tide-water." 

 Mollugo verticillata, was found by Mr. Brackenridge on the Upper Sa- 

 cramento, in the vicinity of the Shasty Mountain. 



