114 CHARACTERS OF TRIBES AND GENERA. 



** Fronds scaly. 



P. lepidota (Pr.) ; P. lanceolata (Linn.) (v v ) ; P. pur- 

 cussa (Oav.) (v v.) ; P. squamata (Linn.) (v v.) ; P. elongata, 

 /. 8m. (Grammitis, Sw.) (v v.) ; P. angusta (H. and B.) ; 

 P. leucosporum (Klot.) ; P. tridens (Kze.) 



OBS. In P. elongata the receptacle is transversely 

 elongated, forming oblong linear sori, which character led 

 Swartz to refer this species to Grammitis. On this same 

 character Klotzsch separates it as a genus, under the name 

 of Mecosorus ; but as other species of the genus have a 

 tendency to produce oblong sori, I do not deem it worthy 

 of adoption. 



29. PARAGRAMMA, Blume (1828). 

 Polypodium sp. auct. ; Hook. Sp. Fil. 



Surculum short csespitose or slender elongated. Fronds 

 simple, linear lanceolate, obtuse, i to 1J foot in length, 

 J to 1 inch broad, smooth, coriaceous. Veins compound 

 anastomosing, internal, obscure, nearly uniform. Recepta*- 

 cles compital, deeply immersed, forming oblong or short 

 linear cysts near to, and parallel with, the margin. Sori 

 oblong linear, marginal, furnished with indusioid stipitate 

 squamee. 



Type. Grammilis longifolia t Blwme. 



Illust. Hook. Fil. Exot., t. 20 ; Moore Ind. Fil., p. 19, B ; 

 J. Sm. Ferns, Brit, and For., fig. 13. 



OBS. The oblong linear sori led Blume to place the 

 typical species of this genus under Grammitis, for which he 

 constitutes the section Paragramma; from Grammitis it 

 differs in having articulate vernation, and having anasto- 

 mosing veins and marginal sori. 



