





















152 THE BRITISH FERNS. 
12. sagittato-lobatum (M.). This is somewhat like sagittato-crista- 
tum (11), but the basal lobes are longer and more acute, directed down- 
wards, and the apex is divided into a tuft of flat, acute segments, 
below which the frónd is irregularly crenate-lobate. It was found 
at the Woodlands, near Whitby, Yorkshire, by Mr. W. Willison. 
18 Claphamii (M.). This variety is of vigorous growth and very 
elegant. The fronds are a foot in length exclusive of the stipites, 
of moderate width—one and a half to two inches, with a pair of 
narrow acute spreading lobes at the base, the margin crisped, and 
somewhat irregularly erenated or sublaciniate, and the apex multi- 
fidly branched, in one example dividing into seven primary branches, 
some of which are again threo-cleft and slightly curled. The fronds 
usually narrow somewhat near the base, and they are sometimes 
contracted below the multifid apex. It is a very handsome form, 
and was found by Mr. A. Clapham, at Grassington, Wharfedale, 
Yorkshire, in 1857. 
14. compositum (M.). This is a singularly composite and very 
elegant form, remarkable from its uniting in itself the peculiar 
characteristics of sagittifolium (7), crispum (91), and marginatum (59). 
The fronds are about a foot long ; they are sagittately-lobed at the 
base; the lower half is undulated or crisped, as is the extreme 
apex, while the upper portion is marginate, and laciniate toothed. 
It was received from Mr. Parker, nurseryman, of Holloway. 
Cornutum Series. 
15. cornutum (M.). This is a very beautiful, as well as eurious 
variety. The fronds are usually dwarfish, though sometimes eight 
or ten inches long, coriaceous, somewhat undulate, irregularly crenate, 
or sometimes deeply lobed, the lobes obscurely toothed ; they are 
cordate or sometimes truncate at the base, and usually abruptly 
rounded at the apex, the costa becoming excurrent about half an 
inch below the extremity, and projecting from the face of the frond, 
forming a long hook or horn, from which the variety takes its 
name. It is a fertile and thoroughly constant variety, invariably 
reproduced from its spores. Mr. Wollaston has a frond in which 
the horn has become developed into a lobed forked fertile frond, 

