Collection of Arctic Plants. 389 
2. R. auricomus, supra in Pl. of Greenland. 
Trollius europeus. 
Confined, as it appears, entirely to Europe ; from the ex- 
treme north to the south : not found however in Iceland. 
3. Caltha palustris, var. radicans. Hooker Fl. Scot. P. I. p.176. 
C. radicans. Engl. Bot. t. 2175. 
Assuredly but a variety of C. palustris, becoming dwarf and 
creeping, with some alterations in the form of the leaves in 
cold and alpine situations. It inhabits the whole of Europe, 
from Greece to the North Cape; Iceland. America, from 
Pennsylvania to about 60° north. Caltha arctica of Brown is 
a plant very nearly allied to this, and is found in Melville 
Island. 
CARYOPHYLLEZÆ. 
4. Silene acaulis, supra in Pl. of Greenland. 
CRASSULACEZÆ. 
5. Rhodiola rosea. 
Frequent in Europe, inhabiting the alps solely in the 
southern part, as the Pyrenees, the mountains of Dauphiny 
and Switzerland, &c. In Britain it grows on the mountains ; 
and in the northern extremity, as Orkney and Shetland, abun- 
dantly on the rocks of the sea-coast. It is found in similar 
situations in the arctic parts of the continent of Europe and in 
Iceland. Not a native, I believe, of the continent of Ame- 
rica: but it has been brought by Captain Scoresby from 
Greenland. 
3 E 2 CRUCI- 
