on British Fernft. xiii 



eighteen inches high, when larger somewhat more divided, 

 and then it is the Pol}q3odium trifidum of Hoffman. 

 Common in woods. 



Athyrium incisum. 



Polypodium incisum, Hoffm. Deutsch. Flor. ii. 6. 

 Athyrium Filix-femina, Roth, Flor. Germ, iii, 65. 

 Athyrium Filix-femina, var. incisum, Neivm. F. 243. 

 Athyrium Filix-fem'ina 0. Bab. 413. 



Frond suberect, subrigid, dull green, lanceolate, pinnate ; 

 pinnae subdistant, 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 proportionably broad. 



Common in wet woods. A much more beautiful fern 

 than either of the preceding, and the t}^e of the genus. 



Athyeium convexum. 



Athyrium rhoeticum. Roth. Flor. Germ. iii. 67 ; Newm. N. 



A. 26. 

 Athyrium Filix-femina, var. convexum, Newm. F. 245. 

 Athyrium Filix-femina, a. Bah. 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. 



