56 



F I L I C E S. 



lanceolate-linear, acuminate, with a crenate undulate margin, and an 

 unequal cuneate base. Sori round, subimmersed, and solitary, forming 

 a continuous row the whole length, equidistant between the costa and 

 margin. 



17. AGLAOMORPHA, Scliott, J. Sm. 



(Psygmium, Presl.) 



1. Aglaomorpha Meyeniana, Scliott. 



Aglaomorpha Meyeniana, Scliott, Gen. Fil. t. 19, ex J. Sm. in Hook. Jour. Bot. 4, 



p. 63 ; Hook. Gen. Fil. t. 91. 

 Psygmium elegans, Presl, Tent. Pterid. p. 200, t. 8, f. 21 & 22. 



Hab. Mountains near Banos, Luzon, Philippine Islands. 



This interesting and singular Fern was found by us inhabiting cliffs 

 and branches of trees, where it forms large tufts or bunches. The 

 sterile fronds are brown, rigid, cordate-ovate, and sessile, about 6 

 inches in length ; in a recent state they have very much the appear- 

 ance of dry oak leaves. In the fertile frond, the lower half is pinna- 

 tifid and sterile, the upper half pinnate; the pinnae long, slender, 

 sinuously pinnatifid or lobed, and articulated with the rhachis. We 

 find the sporangia to be produced on the confluence of two venules, 

 and often only on one, as mentioned by Sir William J. Hooker; 

 but we have not been able to detect them seated on the confluence of 

 several venules, as stated by Mr. J. Smith. 



18. DICTYOPTERIS, Presl, J. Sm. 



(POLYPODII, Sp. Auct.) 



Distinguished from the preceding genus, and also from Drynaria, 

 by the absence of free veinlets, terminating within the areoles. 



