AN ENUMEKATION OF CULTIVATED FERNS. 271 



forming a distichous, synangeous spike, each cell opening 

 horizontally in two equal valves. 



Genus 155. Plant natural size j fertile spike enlarged. No. 3. 



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

 (Euophioglossum.) 



1. O. Iiiisitanicum, Linn.; Hook, et Ch-ev. Ic. Fil.t. 80; 



Lindl. and Moore's Brit. Ferns, t. 51 C; Sowerby's 

 Ferns, t. 47. Ophioglossum vulgatum, var. angusti- 

 folium, Hook. 'Brit. Ferns, t. 47. South of Europe. 



2. O. pedunculosum, Desv.; Eunee, Fil. t. 29, /. 2. 



Korth America. 



