CHARACTERS OP TRIBES AND GENERA. 151 



1J inch long, 6 to 12 pairs, oblong elliptical, short petiolate, 

 densely sericeo squamose. Veins uniform, anastomosing towards 

 the margin. Sporangia obscure, hidden by the silky squama. 



H. vestita, /. Sm. (Grammitis, Wall., Bedd. F. Brit. Ind., 

 pi. 154) ; H. Muelleri, /. Sm. (Gymnogramma, Hook.) ; 

 H. aureo-nitens, /. Sm. (Acrostichum, Hook.) 



OBS. The fine silky hairs and squamae common to these 

 three species is sufficient to indicate that they are naturally 

 allied ; the latter, however, differs in having two kinds of 

 fronds, the sterile being simple, oblong spathulate, and the 

 fertile pinnate. 



In the " Species Filicum," H. Muelleri is described as 

 having free veins, but in the specimens which I have 

 examined I found them to be netted. 



These three species are very local, the first being a native 

 of Nepal, the second of Queensland, and the third found 

 only in the Galapagos. 



*** Cardinitis. 



Caudex decumbent, sub-sarmentose, short. Fronds stipitate, 

 cordate hastate, firm, smooth. Sori copious, contiguous, be- 

 coming confluent. 



H. cordata, Roxb. (v v.) 



Throughout India, the Malay, and the Philippine Islands. 



OBS. For H. Griffithii, Hooker, and Wilfordii, Hook., see 

 Dictyocline ; and for H. citrifolia, Hook., see Anetium. 



65. SYNGRAMMA, /. Sm. (1845). 

 Gymnogramma sp., Hook. Sp. Fil. 



Vernation uniserial, sarmentum short. Fronds stipitate, 

 contiguous, smooth, entire, simple, linear lanceolate, oblong 

 elliptical, or rarely pinnate, 6 to 12 inches long. Veins 

 forked close to the mid-rib, venules direct parallel, their 



