AN ENUMERATION OF CULTIVATED FERNS. 
133 
1. P. angustifolia, Besv. ; Hook. et Bauer. Gen. Fil. t. 77 B. 
Taenitis angustifolia, R. Br. Pteris angustifolia, Sw. ; 
Willd. Pteris tricuspidata, Linn. ; Blum. Fil. 1. 140, 
var. comosa, J. 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 ; J. Sm. Genils 59 ._ Portion 
Gen. Fil.; Lowe’s Ferns, 8 , t. 69. Lindsaea of _ fertile frond, 
Panamensis, Mettn. Hook. Fil. Exot. 
t. 54. — Panama. 
under side. No. 1. 
§ 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. 1. 
