AN ENUMERATION OP CULTIVATED FERNS. 131 
with hyaline squamae. Fronds simple, linear, smooth, rigid or 
flaccid and pendulous, from a few inches to 2-3 feet in length. 
Veins simple, forming an acute angle with the midrib, their 
Genus 56.— Outline portion of frond, natural size ; ditto enlarged. No. 1 . 
apices prolonged into atransverse marginal vein, which becomes 
the receptacle. Sporangia seated in an extrorse Blit of the 
margin. Sori marginal, linear, continuous. 
1. V. zostersefolia, Borg; Fee, Mem. Fil. t. 2,/. 2; Lowes 
Ferns, 2, t. 65 B. — Mauritius. 
57. HAPLOPTERIS, Brest. 
Vernation uniserial, contiguous ; sarmentum short, becoming 
Genus 57.— Portion of frond, slightly enlarged. No. I. 
K 2 
