192 THE BRITISH FERNS. 
upper third of the frond; and on the fronds we have seen, have 
a manifest tendency to occupy rather the central than the basal 
portion of the pinnules: that is, they are distant from the base on 
those pinnules which occupy the lower half of the fertile pinne. 
This variety has been found—in Shropshire: on the Wrekin, Rev. 
W. A. Leighton. Buckinghamshire: Black Park, Dr. Allchin. 
Surrey: Portnall Park, Virginia Water, T. M. Kent: Pitt's 
Wood, Chislehurst, G. B. Wollaston ; Varnes, Dr. Allchin. Devon- 
shire: Barnstaple, C. Jackson. It may be considered asa finely 
developed state of the incisa type, with elongated pyramidal pin- 
nules. [Plate XXXIV B.] 
6. elongata (M.). This is a large growing and beautiful form, of 
the incisa type. The fronds are fragrant, lance-shaped, with rather 
distant caudate pinn®. The pinnules are elongate or linear-oblong, 
narrow as compared with their length, somewhat falcate, serrate on 
the margin, the apex subacute, and they possess the peculiarity of 
being irregular in length, which gives an unevenness of outline to 
the pinn® not usual in forms that are not depauperated. The 
scales of the stipes are fringed. It was found in the Isle of 
Wight by the Rev. W. H. Hawker, and Mr. A. G. More; and 
the same form has been gathered at Addington, Gloucestershire, by 
Mr. H. Buckley. [Plate XXXIV A.] 
7. latipes (M.). Avery curious form of thick fleshy texture, aid 
having two kinds-of fronds. The most normal looking is about two 
feet high, ovate, the lower pinn® not abbreviated, coarse, scarcely 
bipinnate; the oblong overlapping almost spiny-serrate segments 
or pinnules being connected by a narrow wing. The more abnormal 
frond is larger, with large distant deeply inciso-lobate much decur- 
rent pinnules or segments, which are very irregular in size and form, 
and are in some parts depauperated. The upper part of the frond 
is fertile. We have no information as to its constancy; but it is 
a very marked variation., It was found at Ruthin in Denbighshire, 
by Mr. T. Pritchard; and a similar plant but smaller, also dimor- 
phous, has been found in Guernsey by Mr. C. Jackson. 
8. triangularis (M.). This form belongs to the incisa group, but 
has something of the aspect of Lastrea cristata, being remarkable for 
its narrow stiff erectish fronds, and especially for the unequally 

