Ill 



2. Fronds 2-3 pinnate, segments 

 with strong sharp serratures. 



4. A. felix fcemina. 

 II. Fronds 5-6 feet long. 



5. A. gymnogrammoides. 



i. Athyrium hohenackerianum Bedd. 



Rhizome short, densely covered with scales. 

 Stipes tufted, scaly throughout. Fronds 6-18 

 inches long, ij~3 inches broad, lanceolate or 

 ovate-lanceolate, pinnate or almost bipinnate 

 with pinnatifid apex ; pinnae i-2 inches long, 

 cut down nearly or quite to the rachis into ovate 

 or oblong serrated segments. Texture herbace- 

 ous. Surfaces naked. Rachis scaly below. 

 Indusium curved or horseshoe-shaped, bullate 

 (i.e., puckered). [Plate IX.] 



The limits of this species and of Athyrium 

 felix fcemina have not been clearly defined 

 by authors. Indeed, small specimens of the 

 latter fern are often mistaken for this species. 

 The chief difference between the two seems to 

 lie in the involucre which in Athyrium hohen- 

 ackerianum, according to Hooker, in his ' Spe- 

 cies Filicum,' is ' singularly bullate, afterwards 



