ASPIBIE^. kzxiz. 



§ Theli/pterU.—Yems usually forked, both venules fertile towards the 

 margin (indusium irregular fugacious.) 

 Ex.: L. Thelypteris, PresZ. | L.montana,JIfoore(L.Oreopteris,4Mc/.) 



§ Mtm&phUbia. — Veins usually simple ; sori medial or sub-terminal. 



Ex. : L. invisa, I'red. 

 L. serra, Presl. 

 L. patens, Presl. 

 L. augescens, Houlst. 

 L. Sprengelii, Presl. 



L. noveboracensis, Presl, 



L. chrysoloba, Presl, 



L, albo-punctata, Presl, [Presh) 



L. crinlta (Polyp. Poirt L, strigosa, 



L. immersa (Aspldium, Bl,J 



123. OLEANDSA, CavanilUs, Fr<Blect. (1801) 252. 



Neueonia, i>0K. ; Ophiostbeis, JBerMwartff ; AsFXDll sp,, Auat j Hypo- 

 PBLTIDIS sp., B(yry ; PoLTPODIl sp., Auct. 



Sori indusiate, globose, approximate to the costa, the recep- 

 tacles, therefore, sub-basal on the veins or venules. Indmsium 

 reniform, affixed at the sinus. Veins simple or forked from a 

 central costa ; venules parallel, unisoriferous dorsaUy near their 

 base, their apices curved forwards and connivent with the thick- 

 ened margin. 



Fronds simple, membranaceous or sub-coriaceous. Stipes 

 nodoso-articulate. Bhizome creeping, or erect and frutescent. — 

 A very natural group, yet in technical characters not far removed 

 from Zastrea. The species are all simple-fronded, and are hence 

 quite distinct in aspect ; but the most important distinction is 

 found in the nearly basal position of the sori, vfith respect 

 to the veins. 



Ex. : O. neriiformis, Cob. 

 O. artieulata, Presl, 

 O. Wallichii, Presl. 



0. nodosa, Presl, 

 0. pilosa, Hook, 

 0. Cumingii, J, Sm, 



124. NEPHROLEPIS, Schott, Gen. Ml, (t. 3.) 



Nhphboditjm, iwift; Lepidonbtjeon, J'^e; AsvlDil ap,^ Auct ; Nbpheo- 

 Dii sp., Auct. ; Htpopbltidis sp., Bory; PoIiTpodii sp., Auct. ; Datal- 

 Li^ sp., Auct, ; Tectaei^ sp., Cavamillee ; Polystichi sp,, Auct, ; 

 Artheopteeidis sp., J, Smith, 



Sori indusiate, rotundate j the receptacles terminal on the 

 lower anterior venules. Indusvam (1) rotundo-cordato-reniform 

 affixed at the sinus (nephrodioid) ; or (2) sub-reniform affixed 

 oblique-transversely by the arcuate posterior margin (davallioid). 

 Veins pinnato-furcate from a central costa ; venules direct free, 

 thickened at the apices. 



