









74 THE BRITISH FERNS. 
crenately lobed. There is no true lobing in the lower more distinct 
pinne, the enlarged angle not being separated by a sinus from the 
rest ofthe pinna, but the whole margin is toothed, and here and 
there apiculately-toothed as in microdon, but not very distinctly so. 
The sori are short, that is of the Janceolatum character, and usually 
asplenioid, but here and there they become diplazioid or scolopen- 
drioid. The plantis an accidental seedling, which sprung up in the 
fernery of Mr. Clapham of Scarborough. 
3. laciniatum (W.). The fronds of this variety are remarkably 
depauperated, the leafy portion being more or less and in some cases 
entirely wanting; the pinn and pinnules are frequently reduced to 
mere ribs or veins; and the fructification, which is generally very 
copious, protrudes on to the face of the frond, so that an inattentive 
observer would not distinguish the front from the back. Itisa 
sub-permanent form, and oceurs occasionally in the Channel Isles. 
4. crispatum (M.). In this form, which is distinctly bipinnate, 
the margins of the lobes of the pinnules are so curled under as to 
give prominence to the thickened teeth which from the same cause 
are irregular in their direction; the pinnules thus acquire a some- 
what crispy character. It was sent from Guernsey by Mr. C. 
Jackson, 

