CHARACTERS OF TRIBES AND GENERA. 191 



differing- only in the sori being linear, thus agreeing as 

 also in habit with Leptogramma, differing only in the 

 venation of one being free and the other anastomose. On 

 account of the sori being linear both the genera are in the 

 " Species Filicum," placed in Gymnogramme. 



Sp. S. aspidoides, Blume (Syneuron aspidioides, /. Sin. 

 Hook. Ic. PI, t. 950). 



96. GONIOPTERIS, Presl. (1836). 

 Poly podium, sp., auct.; Hook., Sp. Fil. 



Vernation fasciculate, erect or decumbent, acaulose or 

 subarboroid. Fronds pinnatifid or pinnate, rarely simple, 

 1 to 4 feet high. Primary veins costseform, pinnate ; 

 venules opposite, the lower pair only or more, or the whole 

 angularly anastomosing, producing from their junction an 

 excurrent sterile veinlet, which is either free or anastomose 

 in the angle next above it. Receptacles lateral (between 

 the base and angular junction of the venules). Sori punc- 

 tiform, rarely oblong. Sporangia pilose in some. 



Type. Poly podium crenatum, Sw. 



Illust. Hook, and Bauer, Gen. Fil., t. 38 ; Hook. Fil. 

 Exot., t. 84 ; Moore Ind. Fil., 57 A. ; J. Sm. Ferns, 

 Brit, and For., fig. 64 ; Hook. Syn. Fil., t. 5, fig. 48 E. 



OBS. This genus agrees in general habit with the 

 indusiate genus Nephrodium, but the technical distinguishing 

 character is not always to be relied upon, the indusium 

 of some species being often small and fugacious, conse- 

 quently many specimens in herbaria have been referred to 

 Goniopteris, but examination of living plants has proved 

 the herbarium specimens to have been indusiate at some 

 period during their growth. 



Twenty- three species are described in the " Species 



