256 FERNS : BRITISH AND FOREIGN. 



1. F. spieata, Fresl. Triehornanes spicaiam, Sedw. ; lTooh. 



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

 elegans. Budge {in pwti) ; Hook. Exot. Fil. t. 52. Feea 

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

 Indies. 



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



Fil. l,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 oblvpe elongated areolee ; in 



Genus 141). — Portion of barren frond, natural sizej d:t'o fertile 

 enlarged. No. 1. 



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

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

 Tndusium urceolate-calyciform. Beceptacle filiform, continued 

 beyond the sporangia and mouth of the indusium. 



