AN ENUMERATION OE CULTIVATED FEENS. 



271 



forming a distichous, synangeous spike, each cell opening 

 horizontally in two equal valves. 



Genus 156»— Plant natural size ; fertile spike enlarged. No. 3. 



Fronds erect, the sterile segments ovate or linear (Terrestrial). 

 (EuophioglosSum.) 



1. O. Lusitanioum, Limn.; EooTe. et Grev. 7c. Fil. t. 80 ; 



Lindl. amd Moore's Brit. Ferns, i. 51 0; Sowerhy'g 

 Ferns, t. 47. Ophioglossum vulgatum, ■yew. angusti- 

 foliom, SooJe. Brit. Ferns, t. 47. — South of Europe. 



2. O. pedunculosum, Besv. ; Kimze, Fil. t; 29, /. a. — 



North America. 



