X. SCOT.OPEXDRIUM. 179 
shire, by Sir W. C. Trevelyan, and subsequently near 
Selworthy, in the same county, by Mrs. Archer Thomp- 
son, to both of whom I am indebted for specimens. A 
curious form allied to this, having, however, the excurrent 
membranous line on the upper surface, has been met with 
by Mr. S. F. Gray ; and this form if constant, it is pro- 
posed to name supralineum. 
The variety hastatum, differs in having the base hastate, 
instead of cordate. 
The variety crispum, is one of the handsomer forms, 
and quite constant. It is of the usual shape, but the 
margin is very much curled or undulated, from which 
peculiarity it has also obtained the name of undulatum ; 
the base is auriculately cordate. It is usually barren, but 
sometimes fertile. 
The varieties lolatum, multifidum, and ramosum, are 
more decided monstrosities. The first has the point of 
the fronds dilated, and more or less cut into acute lobes, 
and is not very constant. The second has the fronds 
forked more or less, often repeatedly near the extremity, 
all the divisions divided in a multifid manner at the apex ; 
it is usually fertile, but sometimes comes undulated, and 
is then barren. The third has the stipes forked, and the 
branches dilated and multifidly crisped at their apices. 
The variety laceratum is a curious and less constant 
form, grown in the Koyal Gardens at Kew. Sometimes 
the fronds are short, almost as broad as long, very blunt 
at the apex, deeply and irregularly lobed in a pinnatifid 
way almost down the midrib, the lobes being crowded, 
imbricating and much undulated, each of them more or less 
dilated at the apex, and multifidly forked. The lower 
pan- of lobes are sometimes almost distinct, and much en- 
larged, and sometimes the lobes are so developed as to pro- 
duce an approach to the palmate form. In other cases the 
fronds are strap-shaped, the margins inciso-lobate, most of 
the lobes extended into a narrow taper-point. In some 
fronds the apex has a tendency to become multifid ; some 
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