1898.] NATURAL SCIENCES OF PHILADELPHIA. 315 



Equisetum arvense L. 



August 10, 1801/. On the Missouri, above Little Sioux and below 

 Big Sioux River ; Monona Co., Iowa, on the right hand going up ; 

 Burt and Blackbird Counties, Nebraska, on the left. 



Aspidium spinulosum Sw. 



June 20, 1806. " Fort Clatsop ; " but date impossible, as L. & 

 0. were on the Lo Lo Trail in Idaho at this date. Probably " June " 

 is here in error for January. 



Lomaria spicant Desv. Blechnum boreale Pursh, Fl. 669, nee Willd. 



June 20, 1806. " Fort Clatsop ; " impossible ; see last. 

 Hypnum oreganum Sull. 



June 20, 1806. " Fort Clatsop ;" impossible ; see Aspidium 

 spinulosum. 



Bazzania trilobata (L.). S. F. Gray. 



July 1, 1806. Mouth of Traveller's Rest Creek, or Lou Lou 

 Fork of Bitter-Root River. 



Egregia menziesi (Turn.) Aresch. (Phyllospora menziesi.) 



November 17, 1805. Mouth of the Columbia River. 

 Sorbus microcarpa Pursh. 



September J/., 1805, and June 27, 1806. Two different specimens, 

 as well as dates, may be in question. In any event, on September 4, 

 1805, L. & C. passed over the Bitter-root range from Idaho into 

 Montana, from Fish Creek, the north fork of Salmon River, to Ross' 

 Hole, near the head of the east fork of the Bitter-root River; and 

 on June 27, 1806, they were on the Lo Lo Trail, in the Bitter-root 

 Mountains, nearing its east end, about to pass from Idaho into Mon- 

 tana, but at a place 100 miles or more distant from the other. The 

 two situations, however, I should suppose to be practically identical, 

 from a botanical standpoint. 



(Label only.) 



April 11/., 1806. On the Columbia, one day below Rock Fort 

 Camp. 



Phlox speciosa Pursh, Fl. 149. 



May 7, 1806. Not " on the Plains of the Columbia," as said, but 

 on the main Kooskooskee River, below Camp Chopunnish. 



