ASrr.KNU'M LANCICOI-AITM. 



153 



Sori scattered over the whole under side of the frond. Indu- 

 siatc, oblong, and produced along th(> anterior sides of the 

 venules, submarginal, and eventually confluent. 



Indusium white. Veins of the pinnules consisting of a 

 flexuosc midvein, alternately branched. 



This species is more nearly allied to Asplenium luliantum- 

 nigrum than any other British Fern, yet differs in the form 

 of the frond, by its hair-scales on its rachides, in its oblong 

 sori, and by the spores being produced above the fork of the 

 veins, w^hilst in adiantum-nigrum it is below the forking. 



It has also a thinner frond, and the pinnules more equal 

 in size. 



I am indebted to Mr. Clift, of Balsall Moor, Birmingham, 

 for a very flne plant, a collector to whom I shall have again 

 to refer, and who has found some excellent forms of British 

 Ferns. 



There are very few varieties of this species. 



Fig 49.5.— Apex. 



Kalon, Loioe. (Fig. 495.) — Found in Devonshire in 186-i. 

 The frond nearly equal in width, only slightly diminishing in 

 the basal pair of pinna; and near the apex; the frond termi- 

 nating in a square wide apex. The basal pinnae descending, 

 the others horizontal, and the apical pair ascending. Pinna) 

 croAvded, and on their basal half overlapping, elongate-triangular, 

 VOL. II. X 



