1898.] NATURAL SCIENCES OF PHILADELPHIA. 297 



Cissus ampelopsis Pers. 



September 14, 1806. " Council Bluffs, Missouri," as given, is not 

 any locality, for Council Bluffs, Pottawattamie Co., Iowa, did not 

 exist in 1806, and the Council Bluff of L. & C. was much higher 

 up and on the other side of the river, where now stands Fort Cal- 

 houn, Washington Co., Nebraska. L. & C. passed it September 8, 

 1806, coming rapidly down river ; they were, therefore, many miles 

 below when they camped at Leavenworth, Kansas, on the 14th, 

 having come 53 miles that day. 



Acer circinatum Pursh, Fl. 267. 



October — , 1805. " Great Rapids of the Columbia." The date can 

 be set closer, as L. & C. did not reach the Cascades till October 30, 

 1805. The vine maple is fully described on p. 834 of my edition, 

 along with Acer macrophyllum. 



Acer macrophyllum Pursh, Fl. 267. 



April 10, 1806. Cascades of the Columbia, on the home voyage. 

 But L. & C. had noticed it in the same region the previous au- 

 tumn. 



Polygala alba Nutt, P. seneca var. tenuifolia Pursh, Fl. 750. 



August 10, 1806. At or near White Earth River of L. & C, 

 now Muddy River, a branch of the Missouri, at whose mouth is 

 Williston, Montana, near the east boundary of the Fort Buford 

 military reservation. (Not modern White Earth River, which is a 

 different stream, much lower down.) 



Amorpha fruticosa angustifolia Pursh, Fl. 466. 



August 27, 1806. Great Bend of the Missouri, as stated. This 

 formation is below Pierre, South Dakota, and just above the Crow 

 Creek Agency. 



Astragalus missouriensis Nutt. 



September 18, year not given. If 1804, one day below the Great 

 Bend of the Missouri, going up ; if 1806, on the Missouri from 

 Grand to La Mine River, within the recent State of Missouri ; most 

 probably 1804. 



Astragalus mortoni Nutt. 



September 15, 180Jf. At or near mouth of White River, Lyman 

 Co., South Dakota. 



September 5, 180J/.. Mouth of the Niobrara River, or within one 

 day above it. 



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