t. GESTEBA OF T'EfiNS : 



Leptopterii. Pellucid-membranaceous ; sori consisting of fewer more 

 scattered spore-cases. 



Ex. : T. snperba, Colenso. I T. hymenophyUoides, Eich. and Less. 



~' ' ' ~ IT. Wilkesiana, Srackenridge. 



1. Fraseri, Hook, and Gr. 



Order MAKATTIACE^. Tribe MARATTINE2E. 



1 AirGIOPTEBIDE-E. 



168. ANGIOPTERIS, Hoffmann, Comm. GMt. xii. 29, 



t. 5. 

 CtBMBBTBA, Cavanilleg ; ? PsnoDOCHEA, Presl; POLTPODII sp.,^urf. 



Sofi dorsal, involucrate, sessile, linear-oblong or oval-elliptie, 

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

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

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

 vertical cleft. Receptacles linear elevated. Involucres linear,, 

 scariose, 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. Ehizome fleshy, sub- 

 globose, often becoming erect in age. This genus is- known by 

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

 series. Psilodochea 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, Hoffm. \ A. indica, Desv. 



A. crassipes, Wall. A. pruinosa, JTze. 



A. Teysmanniana, De Vr. \ A. salicifolia, De Vr. 



2 MABATTIE.ZE. 

 (a) Sori sessile on the veins. 



169. MARATTIA, Smith, Plant. Icon. Ined.t. 46 48; 

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



MTEIOTHECA, Commerson ; CELAUTHEEA, Thouin; DISCOSIEGIA, Presl. 

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



