AN ENUMEEATION OF CULTIVATED FEENS. 



107 



** Veins comhined at the margin. 

 30. ACONIOPTERIS, Presl. 



Vernation uniserial ; sarmentam 

 short, thick, squamose. Fronds 

 contiguous, elliptical, lanceolate, 

 6-12 inches long, smooth or squa- 

 miferous. Veins simple or forked, 

 parallel, their apices combined near 

 the margin hy a straight or zig-zag 

 vein. Fertile frond Unear, plane, 

 whoUy sporangiferous on the under 

 side. 



Genus 30.— Portionormature 

 frond, under side. No. 2. 



1. A. nervosa, /. Sm. Acrostichum nervosum, Bory. 



Aooniopteris subdiaphana, Presl. Pterid,; Hooh. et 

 BoMer. Oen. Fil. t. 79 B. Acrostichum subdiaphanum, 

 HooJc. et Grev. Ic. Fil. t. 206. — St. Helena and 

 Bourbon. 



2. A. longifolia, Fee, Acrost. t. 41. Acrostichum longifoKum, 



Jacq. {Plum. Fil. t. 135). Elaphoglossum longi- 

 folium, /. Sm. Cat. Gult. Ferns, 1857. Olfersia 

 longifolia, Presl. — Dominica. 



*** Veins reticulated, uniform. 

 31. HYMEIJODIUM, Fee. 

 Vernation fasciculate, decumbent, densely criuite. Fronds 



GcnvB SI. — Portl'-n of frond, under side. No. 1. 



