CHAEACTEES OF TEJBES AND GENEEA. 153 



smooth, flaccid, pinriiB elliptical lanceolate, 6 to 10 inches 

 long. Yenation sub-uniform, reticulated, areoles snb- 

 hexogonoid, oblique. Sporangia occupying the whole of 

 the venules, forming netted sori. 



Type. Uemionitis japonica, Thuiib. 



lUust. Fee Gen. Fil., t. 15, A ; Moore Ind. Fil., p. 47, A ; 

 J. Sm. Ferns, Brit, and For., fig. 53 ; Hook. Syn. Fil., 

 t. 6, fig. 52, c. 



Obs. — This genus differs from the preceding chiefly in 

 habit and in the venation being more uniform reticulated. 



Sp. D. japonica, Fee (v v.) {^G-ymnogramma japonica, Kze. 

 in SchJc. Fil. Suppl., t. 116). 



Native of Japan. 



67.— TiENiTis, Willd. (1806). 



Vernation uniserial, sub-fasciculate. Fronds contiguous, 

 long stipitate, smooth, flrm, coriaceous, 1 to 2 feet in length ; 

 pinnas 4 to 6 pairs, linear-lanceolate or elliptical-acuminate, 

 entire, 6 to 10 inches long, by ] to 2 inches broad. Veins 

 uniform, reticulated ; areolea oblong, hexagonoid, oblique. 

 Receptacles compital, oblong, oblique coalescing, forming a 

 transverse line between the mid-rib and margin. SjJorangia 

 crowded, forming a broad compound continuous, sometimes 

 interrupted, sorus. 



Type. Ta'nitis hlechnoides, Siu. 



lUust. Hook, and Bauer. Gen. Fil., t. 77, B. ; Moore 

 Ind. Fil., p. 17, A. ; Hook. Syn. Fil., t. 6, fig. 57. 



Obs. — This genus is founded on a single species, which 

 agrees in general habit and texture of its fronds with 

 Syngramma pinnata, but is distinguished by the sori being 

 oblique oblong, and laterally confluent, forming a compound, 

 transverse, medial sorus, but in some the line is interrupted, 

 and then constitutes Tcenitis interrupta of Hooker and 



