40 ASPLENIUM DIMIDIATUM. 



1827, it is therefore somewhat singular that nearly thirty years 

 have not sufficed to make it a generally cultivated species. 



The fronds, which are glabrous and slender, are in form 

 linear-lanceolate; pinnate, having oblong pinnae which are 

 imbricate, and attached to the stem by a footstalk. The pinnae 

 are rounded at the apex, and articulate with the rachis. The 

 superior base being parallel with the rachis, whilst the inferior 

 base is truncate obliquely. Margin serrate. 



The length of the frond is twelve inches, and the colour 

 pale green. 



Sori, of which five or six pairs are situated on each pinnae, 

 are linear. 



The rachis and stipes winged and ebeneous. The frond, which 

 is terminal, is attached to an upright fasciculate rhizoma. 



I have not as yet been fortunate enough to procure a plant 

 of this interesting species. 



It is included in Messrs. A. Henderson's Catalogue at a 

 reasonable price. 



My thanks are due to Sir William Hooker, the Director of 

 the Royal Gardens, Kew, for a frond of this species. 



The illustration is from Sir William Hooker's frond. 



