178 CHARACTERS OF TRIBES AXD GEXEEA. 



Sp. p. linearis, Pr. ; P. gTaminifolia, Pr. {Tcenitis granii- 

 nifoUa, Hook. E.xot. Fil, t. 77) ; P. seminucla, /. Sni. 

 (Grammitis seminuda, Willd. ; P. jntmila, Pr.) ; P. furcata, 

 J. Sm. {Grammitis, Sw. ; Mcmograriima furcata, Desv. ; 

 CocMidium graminoides, Kaulf., Scliutt. Gen. Fit., t. 19). 



Small grass-like Ferns, growing in tufts ; natives ot 

 the West Indies and Ti-opical America. 



86. — Hecistop PERIS, J. Sm. (1S4-2). 

 Gymnograruina sp., HooJ^, Sp. Fil. 



Vernation sarmentose, slender, squamose, producing the 

 fronds in fascicles. Fronds simple, linear, cuneiform, forked 

 or more divided (palmoid), half an inch to 2 inches high, 

 plane. Veins simply or iiabellately forked, radiating from 

 aa evanescent costa ; venules terminating in the lacina?, 

 sporangiferous nearly their whole length, forming linear, 

 simple or forked sori. 



Type. Gi/mnogramma puinila, Spreng. 



Illust. Fl'c, Gen Fil, t. 16 B. ; Hook., Seed. Cent, of 

 Perns, t. 8. 



Obs. — This small Fern was originally described bv 

 Sprengel as a species of Gi/mno(jro.mma ; but as it did not 

 appear to me to form any natural alliance with any of the 

 groups of species of that genus, I, therefore, in the Journal 

 of Botany for 184:2, deemed it best to characterise it as a 

 distinct genus. The fronds in some states being simple, 

 and bearing only one sorus, seems to indicate its relation- 

 ship with Monogramma and Pleurogramma. 



Sp. H. pumila, /. Sm. (Gyraiivgramma, Spreng., 2u;e. 

 Analec., t. 8, /. 1). 



West Indies, Central America, Guiana, Brazil. 



