a9V< ,; "lijf: 



Collection of Arctic Plants. 387 



ROSACEM. 



17. Dryas octopetala. Linn. Sp. PL p. 717. 



Var. minor, foliis parvis angustis profunde crenatis. 



Found on mountains in the south of Europe, as the Py- 

 renees, the alps of Switzerland, Savoy, Austria, Britain, Ice- 

 land, Lapland, Siberia, Greenland, &c. ; high mountains in 

 the north-western part of Canada (Pursh) ; and the woody 

 country of North America, between latitude 54" and 64° north 

 {Richardson). 



In Britain this plant prefers a calcareous or limestone soil. 

 I possess specimens with the lower half of the leaves crenate, 

 while the upper are entire ; thus appearing to unite the two 

 species octopetala (or cJiamadry folia, as Pursh calls it, the 

 number of petals being variable,) with the integrifolia {tenella 

 of Pursh). 



18. Potentilla nivea jS, supra in PI. of Greenland. 



„ . POLYGOTSlEM. 



19. Polygonum viviparum, supra in PI. of Greenland. 



20. Oxyria reniformis, supra in PI. of Greenland. 



AMENTACEjE. 



21. Salix polaris. Wahl. El. Lapp. p. 261. t. 13. /. 1. .i 



This appears to have been first discovered in Spitzbergen 

 by Martins ; afterwards by Wahlenberg and Liljeblad in Lap- 

 land. These, I believe, are the only stations for this interest- 

 ing plant. 

 VOL. XIV. 3 E The 



