IXX. fiBNEBA OP FEENS: 



§ JSepioiJiem.— Pellueid-membranaceous; soil consisting of fewer more 

 scattered spore-cases. 

 Ex. : T. superba, Colenso. I T. hymenophylloides, Hich. and Zeaa. 



T, Praseri, Mook. and Gr. \ T. "Wilkesiana, Brachenridge. 



Order— MAHATTIACB^. 2HJe— MAEATTINE^. 



§ 1 AnOIOPTEErDEa). 



168. ATTGIOPTERIS, Soffmamn, Comm. Gott. xii. 29, 



t. 5. 



Clementea, Cavanillee; ? Psilodochea, Presl; Polypodii sp.fAucf. 



Sori dorsal, inroluerate, sessile, linear-oblong or oral-elKptic, 

 consisting' of two opposite contiguous series of (5 — 12) free spore- 

 cases ; which are obovate retuse, sometimes marginate, aiSxed by 

 the base, and bursting on the inner face by an obovate or elliptic 

 vertical cleft, Meceptacles linear elevated. Involucres linear, 

 Bcariose, fimbriate, persistent (? sometimes wanting). Veins 

 simple or forked from a central costa; venules parallel, free, 

 dorsally soriferous near the margins. 



Fronds ample bi-pinnate; pinnules articulate. Spore-cases 

 at first laterally connected, at length free. Rhizome fleshy, sub- 

 globose, often becoming erect ia age. — This genus is known by 

 its free yet contiguous spore-cases ranged in two close opposite 

 series. PsilodocTiea of Presl, containing one Indian species, 

 which we have not seen, is said to differ in the absence of an 

 involucre, and in some other minor points. 



Ex.: A. evecta, Moffm. I A. indica, De»v. 



A. crassipes. Wall. A. pruinosa, Kze. 



A, TeyBmanniana^ Be Vr. \ A. salicifolia, 2>e Vr. 



§ 2 MAEATiiEa:. 

 (a) Sori sessile on the veins. 



169. MARATTIA, Smith, Flant. Icon. Ined.t. 46—48; 

 Id., Mem. Acad. Turin, v. 419. 



Mteiotheoa, Commerson; Cblahtheea, ThoiUn; DrscosTEGlA, Pregl. 



Sori dorsal, involucrate, sessile, oblong, homy, opaque, Ion- 



