168 J. SMITH ON THE GENERA OF FERNS. 



Examp. 1. B. australe, Linn. 2. B. occidentale, Linn. 

 3. B. orientale, Linn, 4. B. striatum, B. Br. 5. B. longi- 

 folium, Humh. 6. B. hastatum, Kaulf. 7. B. corcavadense, 

 Radd. 8. B. Fontanesianum, Gaud. (Sadleria cyathe- 

 oides, Kaulf.) lllust. Schk. crypt, t. 108, 109. Hook, et Grev. 

 Ic. Fil. Hook. Gen. Til t. 54. B. 



Ohs, The habit and venation of this genus is similar to 

 Lomaria; but from that genus Blechnvm differs not only in its 

 fertile fronds not being contracted, but also in the veiniles 

 being continued beyond the soriferous receptacle, and termi- 

 nating in the margin, which is not the case in Lomaria. The 

 only doubtful species of the genus is B. Fontanesianum, which 

 differs from the rest of the genus in the fronds being bipin- 

 natifid, coriaceous, and rigid, the laciniae concave, and the spo- 

 rangia produced on a very thick receptacle, close to the mid- 

 rib, which is much elevated, the indusium is also coriaceous. 

 These characters induced Kaulfuss to form this species into 

 a genus which he named Sadleria, and which I should be glad 

 to retain, but at present I cannot satisfy myself that there is 

 any peculiarity besides texture whereby to characterize it as 

 different from Blechnum. 



64. Salpichl^na, J. Sm. 

 Blechni sp. Kaulf. 



Veins forked; venules direct, their apices combined by a 

 transverse marginal vein, and their base combined by a trans- 

 verse sporangiferous receptacle, constitutina a linear continu- 

 ous costal sorus; indusium revolute, vaulted, cylindrical, its 

 base sporangiferous 



Yrondsjlexuous, climbing by the aid of the petioles, bipinnate; 

 pinnae consisting of usually two to four pairs ofpinmdes, which 

 are nearly opposite, distant, membraneous, linear-lanceolate, 

 acuminate, four to six inches long, margin plain or repand-nn- 

 dulate, sometimes slightly revolute and indusiiform; special in- 

 dusium injiated, of a brown colour. 



Species. S. volubile, J. Sm. (Blechnum volubile, Kaulf.) 



lllust. Kunze s analecla pteridog, t. 13. Hook. Gen. Fil. t, 93. 



