1898.] 



NATURAL SCIENCES OF PHILADELPHIA. 



21 



Rhamnus Purshiana DC. jR. alnifolia Pursh (not 



A shrub apparently a species Michx.), Fl. 166. On the banks 



of the Kooskooskee, M. Lewis. 

 b_ . May, v. s. in Herb. Lewis. 



of Rhamnus. About 12 feet high 

 in clumps ; fruit a 5-valved pur- 

 ple berry, which the natives eat 

 and esteem highly. The berry 

 depressed, globous. On the waters 

 of the Kooskooskee, May 29, 

 1806. 



Rhus Canadensis var. trilobata Gray. 

 No. 57, October 1, 1804. First 

 discovered in the neighborhood 

 of the Kancez River, now very 

 common. The growth of the lit- 

 tle copses which appear on the 

 steep declivities of the hills where 

 they are sheltered from the rava- 

 ges of the fire. Common on the 

 declivity of hills; October 1, 

 1804. 



Cissus Ampelopsis Pers. 



Near Council Bluffs, Missouri, 

 September 14, 1806. [Leaves, 

 stem, peduncles and pedicels. 

 Lewis' specimen not mentioned 

 by Pursh, who gives range of 

 species as Allegheny Mountains, 

 Pennsylvania to Carolina]. 



Acer circinatum Pursh. Pursh, Fl. 267. On the great 



A very handsome species of rapids of Columbia River, M. 

 maple. On the great rapids of Lewis. b_ . v. s. s. fl. 8 

 Columbia, October, 1805. [Ster- 

 ile, but highly characteristic and 

 unmistakable]. 



8 Acer circinatum Pursh. 



" A very handsome species of Maple. On the Grand Eapids of the Colum- 

 bia, October. 1805." Pursh, Vol. I, 267, says : " on the Grand Rapids of the 

 Columbia River, M. Lewis. This beautiful species has the leaves of the size 

 of Acer rubrum." 



