454 
APPENDIX NO. XVIII. 
34. P. frigid A, Villars. in Lam. Diet. Encycl. A. Gray's Man. ed. 
2d. D. C. Prodr. 2 ; p. 572. 
Fog Inlet, 78°. 
35. P. aurea, [3. D. C. Prodr. 2, p. 576. P salisburgensis, Ilcenke, 
Torr. and Gr. 1, p. 441. A single specimen, with leafy and sparingly 
hirsute 2-3 -flowered stems. Radical leaves 3-5 foliolatc, leaflets 
obovatc, nearly glabrous, flowers on long filiform pedicels. Petals 
obcordate, deep yellow, nearly twice the size of the calyx. Resembling 
exactly the fig. of P. aurea spontanea of Halley's Synops. Potent. T. 8. 
Fiske Fiord, 64°. 
36. P. tridentata, Ait. Mich. FI. Bor. Am. 1, p. 304. Hook. 
FI. Bor. Am. 1, p. 195. Torr. and Gr. 1, p. 445. 
Sukkertoppen, 65°; Holsteinborg, 68°; Rensselaer Harbor, 79°. 
ONAGRACEjE. 
37. Epilobium angustifolium, Linn. Hook. FI. Bor. Am. 1, p. 
, 205. E. spicatum , Lam. Diet. Bot. Torr. and Gr. 1, p. 487. 
Fiske Fiord, Disco, Upernavik, 72°. 
38. E. latifolium, Linn. ' FI. Dan. T. 365. Pursh’s FI. p. 259. 
Torr. and Gr. 1, p. 487. 
Fiske Fiord, 64°; Upernavik, 73°. 
CRASSULACE^E. 
39. Sedum rhodiola, D. C. Prodr. 3, p. 401. Rhodiola rosea , 
Linn. R. odorata , Lam. Illustr. T. 1035. Torr. and Gr. 1, p. 558. 
Holsteinborg, 68°; Upernavik, 73°. 
SAXIFRAGACEiE. 
40. Saxifraga oppositifolia, Linn. FI. Lapp. T. 2. Pursh’s FI. 
p. 311. Hook. FI. Bor. Am. 1, p. 243. Torr. and Gr. 1, p. 563. 
At almost every station of the 1st and 2d Voyages. 
This species varies very much in its forms. I have stems scarcely 
one inch high, densely cespitose, with leaves all imbricated in four rows 
and flowers almost sessile; others with numerous branches thickly set 
and spreading on the ground, leaves imbricated in the inferior part and 
opposite toward the top; others again with long sterile branches and 
leaves all opposite and remote. I have also the form S. Eschscholtzu 
of Sternb., with silvery-gray foliage, which cannot be separated from 
this species. From the large and beautiful purple flowers, apparently 
monopetalous, which are peculiar to this species, I have no doubt it ia 
