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XXIX. — Description of a New Species of Poten- 

 tilla, from the West Coast of Greenland ; with 

 some Account of the Arctic Mora. 



By Robert Kaye Greville, Esq. M. W. S. 



(Read 18th November 1820.) 



In submitting the following paper to the notice of 

 the Society, I have not merely been actuated by the 

 pleasure common to all lovers of Natural History, 

 that of delineating and describing a new object ; 

 nor have I confined myself to the additional and 

 pleasing task, of rendering that public homage to a 

 brother-labourer in the same field, that every libe- 

 ral mind delights to acknowledge. The state of 

 botanical knowledge, as confined to the Arctic Re- 

 gions, is yet very limited ; and, above all, the gene- 

 ral as well as particular geographical distribution 

 of plants, is a subject that has only been noticed by 

 a few individuals. Whatever contributions, then, 



