DICTYOXYl'IIIUM. 226 



vent on both sides. Veins internal, transverse, subapproxi- 

 mate,Jle.v nose, very mucli branched. \'eiiilets anastomosing 

 copionsli/ into unequal somewliat C-sided areules ; the areoles 

 bearing forked veins, ivhose ultimate branchlets are free, and 

 clavate at the apex. 



1. D. Panamense, Hook. Gen. Fil. Tab. C2. 



Hab. Isthmus of Panama, coast of the Pacific, Cuming, n. 1 124. New 

 Grenada, Purd'tv. — A veiy rare and siufrular fern, with the lial)it of Vit- 

 taria, l)ut hroadcr llian any known species and more rij^id, friictilication of 

 a lAndstai, and with the venation of Amphihlcstra amon^j the Adiantum 

 frroup, or (ii/munptcris amoii}^ the Acrostichum group. Tlie fronds are 2 

 to 3 feel long and more, the sterile ones much broader than the fertile, 

 but the sterile sometimes become fertile towards the apex. 



END OF VOL. I. 



