188 CHAEACTERS OF TRIBES AND GENERA. 



Illust. Seeman Bot. Yoy. of H.M.S. Herald, p. 227, 

 t. 48. 



OBS. At page 227 of the "Bot. of Yoy. Herald," I 

 described the Fern from which the above character is 

 derived, under the name of Ctenopteris (Glyphotcenium) 

 crispata, and stated that I considered it allied to Polypodium 

 scolopendroides, Hook, and Grev. and P. suspensum, Sw., 

 but from which it differs in having anastomose venation, 

 and its vernation being adherent, not articulate, as in these 

 two mentioned species ; I therefore deem it best to charac- 

 terise it as a distinct genus under the above name. These 

 characters, and the peculiar habit of the plant, renders it 

 difficult to point out its true affinity otherwise than in 

 Ctenopteris. It grows in a pendulous manner on trees in 

 Darien and Panama. 



Sp. G. crispatum, J. Sm. 



Tribe 13. PHEGOPTERIDB^B. (Plate 13). 



Fronds varying from simple to decompound multifid. 

 Venation free or anastomosing in various ways. Sori 

 punctiform or linear, naked or furnished with an indusium, 

 which is either lateral, peltate, rarely calyciform. 



OBS. This is an extensive tribe of Ferns, comprehending 

 all the Pliegopteris section of Polypodium and the tribe 

 Aspidiacece as given in the " Species Filicum," the number 

 being, as reduced in the " Synopsis," 366 ; while Mettenius, 

 in a special memoir of Phegopteris and Aspidium, enumerates 

 299*. In the greater number the vernation is fasciculate 

 and acaulose, and in others uniserial. With few exceptions 



* In the Appendix to Syn. Fil. sixty-one species are enumerated, the 

 greater number of which belong to this tribe. 



