AN ENUMERATION OF CULTIVATED FEENS. 



107 



** Veins combined at the margin. 

 30. ACONIOPTERIS, Presl 



Vernation uniserial ; sarmentum 

 sliort, 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 by a straight or zig-zag 

 vein. Fertile frond linear, plane, 

 wholly sporangiferous on the under 

 side. 



Genus 30. Portion of mature 

 frond, under side. No. 2. 



1. A. nervosa, J. 8m. Acrostichum nervosum, Bory. 



Aconiopteris subdiaphana, Presl. Pterid.; Hook, et 

 Bauer. Gen. Fil. t. 79 B. Acrostichum subdiaphanum, 

 Hook, et Grev. Ic. Fil t. 205. St. Helena and 

 Bourbon. 



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



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

 folium, JT. Sm. Cat. Cult. Ferns, 1857. Olfersia 

 longifolia, Presl. Dominica. 



*** Veins reticulated, uniform. 

 31. HYMENODIUM, Fee. 

 Vernation fasciculate, decumbent, densely crinite. Fronds 



Genus 81. Portion of frond, under side. No. l. 



