to the Rocky Mountains. 203 



Along the base of the Rocky Mountains, and on the head 

 waters of the Arkansa and Canadian, extending, it is said, 

 into the Spanish provinces as far as Monterey. 



Obs. Arborescent, much branched, 6-10 feet high, and 5 

 or 6 inches in diameter near the root ; ultimate divisions con- 

 sisting of long cylindrical articulations. Flowers as large as 

 in C.ferox, purple, at the extremity of the articulations. Ar- 

 mature terrific. Besides the large spines, there are smaller 

 radiating ones, on little papillae, which cover every part of 

 the plant. It does not grow in thickets, but each plant forms 

 an impenetrable cluster by itself. Dr. James observed also, 

 two other shrubby species of Cactus, growing occasionally 

 with the preceding; one of them about four feet high, armed 

 with long solitary spines, flowers yellow ; fruit about as large 

 as a cherry, pleasant to the taste. 



GROSSULARLE. 



160. Ribes aureum, Pursh fl. i. p. 164. JYutt. gen. i. 

 p. 140. About the base of the Rocky Mountains. This 

 beautiful shrub is now very common in gardens. 



SAXIFRAGES. 



161. Saxifraga nivalis, L. Pursh fl. i. p. 310. R. 

 Brown, in supp. Parry's 1st voy. No. 27. On the Rocky Moun- 

 tains. Found also in Canada and Labrador, Pursh. In 

 Melville Island, Parry. Shores of the Arctic Sea, Dr. Rich- 

 ardson. 



162. S. flagellars, Sternb. R. Brown, 1. c. No. 23. 

 Hook, in Lin. trans, xiv. S. setigera, Pursh fl. i. p. 312. 

 On the Rocky Mountains, as well as all the following. A 

 species remarkable for its numerous creeping suckers. First 

 discovered on the North-west Coast, by Kelson. Melville 

 Island, Capt. Parry. Found also on the Caucasian Alps. 



