AN ENUMERATION OE CULTIVATED FERNS. 



107 



** Veins combined at tlie margin. 

 30. ACONIOPTERIS, Presl. 



Vernation uniserial ; sarmentum 

 shc^t, 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 sporangiforous on the under 

 side. 



Genus 30. — Portiono 

 frond, under side. 



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



Aconiopteris subdiaphana, Presl. Pterid.; Hoolc. ct 

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

 Hook, et Grev. Ie. Fil. t. 205.— St. Helena and 

 Bourbon. 



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



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

 folium, J. 8m. Cat. Cult. Ferns, 1857. Olfersia 

 longifolia, Presl.— Dominica. 



*** Veins reticulated, uniform. 

 31. HZMENODIUM, Fie. 

 Vernation fascicukte> decumbent, densely crinite. Frondt 



Genus SI.— Portion of frond, under side. No. 1. 



