240 POLYSTICHUM ANGULAUE. 
toothed lobe ; all are saw-edged. The lowest leafit on 
the upper edge of the leaflet's stalk, and next the stem of 
the frond, is larger than the other leafits, though not so 
markedly larger or regular in its position up the stem as 
in P. aculeatum. All the lobes and teeth end kx hairs, 
softer and less bristle-like than in P. aculeatum, and on 
their under surface are many hair-like scales. The mid- 
vein of each leafit is straight, emitting side- veins in oppo- 
site pairs, and the side-veins are branched. On the 
lowest of the upper branches of these side-veins is the 
fructification. It is in circular masses, each having a 
cover (indusium), slightly depressed in the centre, and 
usually entire. 
There are two varieties. Subtripinnatum (almost- 
doubly -leafited), with the lower leafits very deeply 
cut, and the sections or lobes sometimes distinct. An- 
gustntum (narrow-leafited), all the leafits being very 
narrow, and much more pointed than are those of the 
species. 
It is found in similar situations as P. aculeatum, and 
is plentiful in England, Wales, and Ireland, but less 
abundant in Scotland. Wherever aculeatum occurs this 
species is likely to be found. 
There is little doubt that this species was known to 
Kay in 1696, when he published the second edition of 
his Synopsis Stirpium Britannicarum. After particular- 
ising the Fern we nave previously described as Poly- 
stichum aculeatum, Ray next mentions Filix Lonchitidi 
qffinis (Fern related to Lonchitis), adding, " Under this 
title was sent to me, by Mr. Lloyd, a plant like to the 
