AN ENUMERATION OF CULTIVATED FERNS. 



133 



1. P. angustifolia, Desv. ; Hook, et Bauer. Gen. Fil t. 77 B. 

 TcBnitis angustifolia, R. Br. Pteris angustifolia, Sw. ; 

 Willd. Pteris tricuspidata, Linn. ; Plum. Fil. 1. 140, 

 var. comosa, /. 8m. West Indies. 



59. DICTYOXIPHIUM, Hook. 

 Vernation fasciculate, erect. Fronds simple, 

 linear-lanceolate, attenuated and decurrent on 

 the stipes, 13 feet long. Veins compound 

 anastomosing. Receptacles compital, elongated, 

 immersed in an extrorse marginal groove, which, 

 is indusiform. Sori linear, continuous. 



1. D. Panamense, Hoofc. Gen. Fil t. 62 ; J. Sm. Genns 59 ._ Portion 

 Gen. Fil; Lowe's Ferns, 8, t. 69. Lindsaea of fertile frond, 

 Panamensis, Mettn. Hook. Fil Exot. 

 t. 54. Panama. 



5. Ceratopterice. Fertile fronds contracted ; segments 

 revolute, forming an universal indusium, enclosing the sporangia. 



60. CEBATOPTEBIS, Brongn. 

 Vernation fasciculate, erect (annual). Fronds fragile ; the 



Genus 60. Portions of fertile and barren fronds, natural size ; portion of 

 fertile enlarged. No. I. 



