AN ENUMERATION OF CULTIVATED PEENS. 



107 



** Veins combined at the margin. 

 30. ACOETIOPTERXS, Presl. 



Vernation uniserial ; sarmentum 

 short, thick, squamose. Fronds 

 contiguous, elliptical, lanceolate, 

 612 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 



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, 

 HooJc. 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, /. 8m. Cat. Cult. Ferns, 1857. Olfersia 

 longifolia, Presl. Dominica. 



*** Veins reticulated, uniform. 

 31. HYMENODITJM, Fee. 

 Vernation fasciculate, decumbent, densely crinite. Fronds 



Genus 31. Portion of frond, under side. No. 1. 



