POLYPODIACE.E. 129 



late ; as we have frequently seen them in a state of cultivation, bearing 

 a short segment or lobe on each side of the costa, near the base ; a 

 circumstance which induces us to believe, that the B. irifoliatum of 

 Kaulfuss is only a mere form of the present species. Farther, the 

 minute tubercles described by him as existing on the stipe of B. tri- 

 foliatum, are also present in our B. lanceolatum, thereby strengthening 

 our belief of the unity of what has heretofore been considered two 

 distinct species. 



* * Frondes pinnatce. 



2. Blechnum occidentale, Linn. 



Blechnum occidentale, Linn, ex Sw. Syn. Fil. p. 113 ; Willd. Spec. PI. 5, p. 412 ; 

 Gaud. Bot. Freyc. Yoy. p. 395 j Hook. Gen. Fil. t. 54, B. 



Hab. Environs of Rio Janeiro, Brazil ; of very frequent occurrence. 

 3. Blechnum glandulosum, Kaulf. ? 



Blechnum glandulosum ? Kaulf. Enum. Fil. p. 161. 



Hab. Organ Mountains, Brazil. 



Our specimens of this are young, but they agree in a great measure 

 with the character of the species. Gaudichaud, with a doubt, refers 

 this to the B. occidentale of Swartz ; but we incline to consider the two 

 as distinct. 



4. BlechnUxM gracile, Kaulf. 



Blechnum gracile, Kaulf. Eoum. Fil. p. 158. 



Hab. Vicinity of Rio Janeiro, Brazil. 



5. Blechnum australe, Linn. 



Blechnum australe, Linn, ex Sw. Syn. Fil. p. 114; Willd. Spec. PL 5, p. 410. 



33 



