AN ENUMERATION OE CULTIVATED FERNS. 
107 
** Veins combined at the margin. 
30. ACONIOPTERIS, Presl. 
Vernation uniserial ; sarmentum 
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 by a straight or zig-zag 
vein. Fertile frond linear, plane, 
wholly sporangiferous on the under 
side. 
1. A. nervosa, J. Sm. Acrostichum nervosum, JBory. 
Aconiopteris subdiaphana, Fresl. Pterid.; Book, et 
Fauer. Gen. Fil. t. 79 B. Acrostichum subdiaphanum, 
Book, 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, J. 8m. Cat. Cult. Ferns, 1857. Olfersia 
longifolia, Presl. — Dominica. 
Genus 30.— Portion of mature 
frond, under side. No. 2. 
*** Veins reticulated, uniform. 
31. HYMENODITJM, Fee. 
Vernation fasciculate, decumbent, densely crinite. Fronds 
Genus 31. — Portion of frond, under side. No. l. 
