AN ENUMERATION OF CULTIVATED FERNS. 



133 



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

 Ta3nitis angustifolia, R. Br. Pteris angustifolia, Sw> ; 

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

 var. comosa, /. Sm. West Indies. 



59. DICTYOXIPHIUM, Hook. 

 Vernation fasciculate, erect. Fronds simple, 

 linear-lanceolate, attenuated and decurrent on 

 the stipes, 1-3 feet long. Veins compound 

 anastomosing. Receptacles compital, elongated, 

 immersed in an extrorse marginal groove, which 

 is indusiform. Sori linear, continuous. 



1. D. Panamense, Hook. Gen. Fil t. 62 ; /. 8m. Genns 59 ._ Portion 

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

 Panamensis, Mettn. Hook. Fil Exot. m ide * No " K 

 t. 54. Panama. 



5. Ceratopterice. Fertile fronds contracted ; segments 

 revolute, forming an universal indusium, enclosing the sporangia. 



60. CERATOPTERIS, Brongn. 

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



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

 fertile enlarged. No. i. 



