438 Mr. Don's Remarks on some British Ferns. 



and by the still more important characters of its more copious sori, and of its 

 narrower and tapering indusium. In the alpina the segments are linear, and 

 the sori much fewer, being mostly solitary on the lobes, and the indusium 

 broader, truncate, and not taper-pointed. 



It is hoped that some fortunate botanist will discover a British station for 

 this plant ; for the original one at Low Layton no longer exists, and the Welsh 

 specimens belong to fragilis. 



The alpina is accurately represented by Schkuhr, Jacquin, Seguier, and 

 several other authors ; but of the present species there are no authentic figures, 

 except the one in English Botany, and that of Vaillant {Bot. Paris, t. 9./. 1.). 



