F. vesca v. americana Porter 
Sibbaldia proourabens L. 
Potantilia arguta Putsh 
) ShiJLuA. 
P. . r y, 
<f Stf.ifr f,W- - hU'u'-tcfj PS, tr**. 
<ij. wi^ r*x. 
P. ; u e nsp.—v -. norvegica (L. H«4b.. 
?. >aeasp. v. labra'dorica ' (Lehri-. )'Pe*aa±d 
P. argentea L. 
