on British Ferns. 
xiu 
eighteen inches high, when larger somewhat more divided, 
and then it is the Polypodium trifidum of Hoffman. 
Common in woods. 
Athyrium incisum. 
Polypodium incisum, Hoffm. Deutsch. Flor. ii. 0. 
Athyrium Filix-femina, Roth, Flor. Germ. iii. 65. 
Athyrium Filix-femina, var. incisum, Newm. F. 243. 
Athyrium Filix-femina 0. Bab. 413. 
Frond suberect, subrigid, dull green, lanceolate, pinnate; 
pinnae suhdistant, pinnate ; pinnules deeply incised or 
lobed, divisions dentate ; clusters of capsules close, owing 
to the greater subdivision of frond not ranged in series, but 
crowded and finally confluent. A large plant, two to four 
feet high, and proportionally broad. 
Common in wet woods. A much more beautiful fern 
than either of the preceding, and the type of the genus. 
Athyrium convexum. 
Athyrium rhoeticum, Roth. Flor. Germ. iii. 67 ; Newm. N. 
A. 26. 
Athyrium Filix-femina, var. convexum, Newm. F. 245. 
Athyrium Filix-femina, a. Bab. 413. 
Frond pale green, erect, rigid, linear lanceolate, pinnate ; 
the stipes and rachis semipellucid, and often beautifully 
coloured with purple or red; pinnae distant, at first ascend- 
ing, then spreading, and finally deflexed, extremely acute ; 
pinnules distant, very narrow, linear, entirely unconnected, 
their margin convolute ; clusters of capsules subrotund, 
close to the midrib of the pinnule, and finally covering 
their under surface, and themselves partially covered by 
the convolute margin of the pinnules. 
Not uncommon in exposed localities. 
Ohs . — The seedlings of these plants are particularly abundant near 
the parent; they constitute the A. rhoeticum, var. minus of Roth, and 
the Aspidium irriguum of Smith. 
