
THE COMMON HART'S-TONGUE FERN. 157 
26. reticulato-fissum (M.). This is a fine form, resembling fissum 
(23) in general aspect, the frond growing a foot or more in length 
exclusive of the stipites, and measuring an inch and a half to two 
inches in breadth, lobed irregular undulated and laciniate-toothed 
at the margin, the apex obtuse, the base unequal and subtruncate. 
It is most remarkable for having the veins so much disarranged 
from the normal condition that near the costa they become confluent, 
often in thick bundles, forming irregular areoles throughout the whole 
length of the frond. It was found at St. Lawrence, in the Isle of 
Wight, by Mr. R. Bloxam. 
27. fissile (M.). This is a distinct variety, with fronds nearly a 
foot long, and about an inch wide, unequal and subtruncate at the 
base, narrowed at the apex, the margin very deeply-lobed or sub- 
pinnatifid in an irregular manner, the larger lobes unequal, separated 
by open sinuses, and again divided into round-ended lesser lobes, 
or erenately-toothed. The sori are numerous and very irregular. 
The marginal lobes are more numerous but less crowded than in 
fissum (23), and macrosorum (22). It has been found near Nettle- 
combe, by Mr. C. Elworthy; and a closely similar form has 
been obtained at Mowthorpe Dale, Malton, Yorkshire, by Mr. C. 
Monkman. 
28. elegans (M.). A neat and elegant plant, six to eight inches 
high, the fronds narrowish but irregular, sometimes with prom- 
inent lobes like arrested branches, but more usually wavy in 
outline, the margin erenately toothed, and minutely crisped in a 
very elegant manner; the base is subtruncate, and the apex 
bluntish. It seems to be sparingly fertile. It was found near 
Malton, Yorkshire, by Mr. C. Monkman. 
99. obtusidentatum (M.). Thisis a pretty dwarfish variety, hav- 
ing the fronds variable in length, from six inches to a foot long, 
and about an inch and a quarter in width; the base is truncate, 
the apex usually blunt, the midrib not reaching the end; the 
margin sometimes lobed, the lobes separated by broad sinuses, 
sometimes scarcely lobed, but the whole margin is constantly notehed 
with evident nearly uniform erenatures or blunt teeth. The sori 
occur in longish masses, and are irregularly placed. It was found 
near Ilfracombe, in 1855, by the Rev. J. M. Chanter. An elegant 

