412 
ON THE VARIETIES OF BRITISH FERNS, AND THE DIAGNOSTICS 
OF ALLIED SPECIES. 
By Thomas G. R. Rylands, Esq. 
(Continued from p. 288.) 
Asplenium viride. 
Hooker’s Brit. Flo., 3rd Edit*, p. 453 ; 4th Edit., p. 388* 
Bolton’s Fil. Brit., p. 24, tab. 14. 
Francis’s Ferns, p. 39, pi. 3, fig. 5. 
Withering’s Bot. (MacGillivray), p. 383. 
This plant in many points resembles A. trichomanes , though I know not that 
they have often been mistaken for one-another. It is easily distinguished by its 
rotundo-deltoid pinnae, lighter colour, and green rachis; it is sometimes found 
with the rachis once or twice branched (/3. ramosum, Auct.). Bolton mentions 
a a rare” variety in which “the lobes are sub-divided, and the sub-divisions 
elegantly crenated and lobed.”* 
Asplenium marinum. 
Hook., Brit. Flo., Edit. 3, p. 453 ; Edit. 4, p. 388. 
Bolt., Fil. Brit., p. 26, tab. 15. 
Francis’ Ferns, p. 37, ph 3, fig. 3. 
With. (MacGill.), p. 383. 
In the specimens of this plant I have from Hulme Quarry—where it is now 
only found in a young state—the pinnae are rather closer, broad, and more 
regularly crenate than in those from the coast. Is it so in the other inland 
stations ? 
Of Mr. Shaw’s “ much-divided” variety, I have not seen or heard more than 
Mr. Francis’ note (p. 38. Brit. Ferns). 
Asplenium adiantum-nigrum. 
Hook., Brit. Flo., Edit. 3, p. 453 ; Edit. 4, 388. 
Bolt., Fil. Brit., p. 30, tab. 17—1. 
Francis’ Ferns, p. 41, pi. 3, fig. 8. 
With. (MacGilliv.), p. 383. 
This has often been mistaken for A. lanceolatum, and vice versa ; I have a# 
* Fit. Brit., p. 3, tab. 2, fig. 2' 
