256 FERNS I BEITISH AND FOREIGN. 



1. F. spicata, Presl. Trichomanes spicatum, Hedw. ; Hook. 



Gard. Ferns, t. 60 ; Lowe's New Ferns, t. 67 0. T. 

 elegans, Rudge (in part) ; Hook. Exot. Fil. t. 52. Feea 

 polypodina, Bory, in Diet. Sc. Nat. cum Ic. West 

 Indies. 



2. F. nana, Bory. Trichomanes nanum, Bory ; Hook. Sp. 



Fil. I, p. 115. Guiana. 



140. HYMENOSTACHYS, Bory. 



Vernation fasciculate, erect. Fronds of two forms, 6-10 

 inches high; the sterile pinnatifid; the fertile contracted, 

 linear, longer than the sterile. Veins in the sterile forked ; 

 venules anastomosing, forming oblique elongated areoles ; in 



Genus 140. Portion of barren frond, natural size; ditto fertile 

 enlarged. No. 1. 



the fertile, simple or forked, free. Sori terminal, immersed 

 contiguous in a row along both margins of the fertile frond. 

 Indusium urceolate-calyciform. Receptacle filiform, continued 

 beyond the sporangia and mouth of the indusium. 



