52 J. SMITH ON THE GENERA OF FERNS. 



Examp. 1 . L.asplenioides. ( Siv*) 2. L. totta. ( Schlecht.) 

 3. L. Lovei. (Hook.) 4, L. villosa. (Link.) 5. L. polypodi- 

 oides. (Spreng.) 6. L. Linkiana. (Presl) 7. L. gracile. 

 (IIew.)—l\\nst. Hook, et Grev. Ic. Til. t. 89. 



Ohs. This genus agrees in habit with many species of Pohi- 

 podium, and is distinguished by having linear sori, but in one 

 or two of the species the sori are scarcely more than oblong. 

 With Grammitis it agrees in the form of the sori, but differs 

 totally in habit from those species which I now retain as true 

 Grammitis. Its simple sori distinguish it from Gymnogramma. 



Sect. II. — Symplophlebie^. J. Sm. 



Venation variously anastomosed or reticulated. 



12. Stenosemia. Presl. J. Sm. 



(Acrostichi sp. Sw. Polybotryse sp. Bhime.) 



Veins costseform, pinnate. Vemdes simple or forked, the 

 lower opposite pairs and their branches angularly anastomos- 

 ing, the others free; the fertile ones usually less anastomosed, 

 sometimes all free. Sporangia terminal or medial, round or 

 linear, distinct or confluent in pairs, or somewhat amorphous. 

 — Fronds 1 to 2 feet high, Mpinnatijid. Stipes eheneous, 

 lacinicB obtuse, entire, or the lower ones slightly laciniated, 

 axis of the pinnae often gemmiferous. Fertile fronds often im- 

 perfectly developed, constituting rachiform sporangiferous 

 spikes. 



Species. S. aurita. Presl. — Illust. Blume Fl. Jav. t. 1. 



Ohs. This Fern has hitherto been placed in the tribe 

 Acrostichece ; and Presl has characterized it as a genus dis- 

 tinct from Polyhotrya by its anastomosing veins; but on ex- 

 amining specimens collected in the Philippine islands by Mr 

 Cuming, it appears evident that all former descriptions and 

 figures of the fertile fronds, have been taken from starved or 

 imperfectly developed fronds, which appear as if contracted, 



* The authority for the specific names being in a parenthesis, denotes 

 that such species stood formerly under one or other of the genera given as 

 synonymes. 



