438. Mr. Dow'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, aud 
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. f. 1.). 
