294 PROCEEDINGS OF THE ACADEMY OF [1898, 



Erysimum aspersum DC. E. lanceolatum Pursh, FI. 436, nee R. Br. 



June 1, 1806. Camp Chopunnish, as above described. This is 

 on the Kooskooskee. But the other specimen which Mr. Meehan 

 adduces from " Rockford Camp, April 17, 1806," is from The Dalles 

 of the Columbia. " Rockford " Camp, elsewhere called " Rocky " 

 or " Rock," is a mistake for Rock Fort or Fort Rock Camp, as L. & 

 C. called it when they were at The Dalles. The position is at the 

 mouth of their Quinett Creek, called Wasco Creek on some maps, 

 and now Mill Creek. The position is one of the best known on the 

 Columbia, Oregon side. L. & C. were there October 17, 1805, 

 going down, and April 15-17, 1806, coming up. 



Cleome integrifolia T. & G. C. serrulata Pursh, Fl. 441. 



August 25, 180 Jf. At or very near mouth of Vermilion River, 

 Clay Co., South Dakota. (Whitestone River of L. & C.) 



August 29, 1806. At or near mouth of White River, Lyman 

 Co., South Dakota. 



Cerastium arvense L. C. elongatum Pursh, Fl. 321. 



April 22, 1806. On the Columbia, between Des Chutes and 

 John Day Rivers (the Towanahiooks and Le Page's Rivers of L. 

 & C). " Plains of the Columbia," as given, is therefore quite 

 right. 



Malvastrum coccineum Gray. Grietaria coccinea Pursh, Fl. 453. 



July 20, 1806. " Plains of the Missouri," as given, is a mistake, 

 unless the phrase is used in a very broad sense. On this date the 

 expedition was widely separated. Lewis was high up on Maria's 

 River near its forks in N. W. Montana ; Clark was on the Yellow- 

 stone, at Camp Cottonwood, above Clark's fork of that river. Clark 

 was busy building boats, and no doubt Lewis collected the plant. 

 The latter botanized that day, as we see by his Journal, p. 1090 of 

 my edition. 



Linum lewisi Pursh, Fl. 210. 



July 9, 1806, and July 19, 1806, for the same specimen ; the dates 

 conflict, but " valleys of the Rocky Mountains," as given, can be 

 right for neither date in 1806, if the locality of this particular 

 specimen is meant. On July 9, 1806, Lewis was on Sun River, at 

 or near Fort Shaw, Montana. On July 19, 1806, he was high up 

 on Maria's River; both of these places are out of the mountains. 

 But probably the label was only meant to indicate the general 

 range of the plant, not the exact locality of the specimen. Peren- 



