Ixxxix. 



Tkelypterit. Veins usually forked, both venules fertile towards the 



margin (indusium irregular fugacious.) 



Ex. : L. Thelypteris, Presl. \ L.montana^oore(L.Oreopteris,4M<rf.) 



MonopUebia,. Veins usually simple ; sori medial or sub-terminal. 



Ex.: L. invisa, Presl. 

 L. serra, Presl. 

 L. patens, Presl. 

 L. augescens, Houlst. 

 L. Sprengelii, Presl. 



L. noveboracensis, Presl. 



L. chrysoloba, Presl. 



L. albo-punctata, Presl. [PretlJ 



L. crinita (Polyp. Pair; L. strigosa, 



L. immersa (Aspidium, Sl.J 



123. OLEANDRA, Cavanilles, Prcelect. (1801) 252. 



NBUBONIA, Don. ; OPHIOPTEBIS, Reinwardt ; ASPIDII sp., Auct. ; HTPO- 

 PBMIDIS sp., Sory; POLTPODII sp., Auct. 



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

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

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

 central costa ; venules parallel, unisoriferous dorsally near their 

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

 ened margin. 



Fronds simple, membranaceous or sub-coriaceous. Stipes 

 nodoso-articulate. Ehizome creeping, or erect and frutescent. 

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

 from Lastrea. 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, with respect 

 to the veins. 

 Ex. : 0. neriiformis, Oar. I 0. nodosa, Presl. 



O. articulata, Presl. O. pilosa, Hook. 



O. Wallichii, Presl. \ 0. Cumingii, J. Sm. 



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



NBPHBODIUM, Link; LEPIDONEITBON, Fee; ABPIDII sp.,Auct.; NEPHBO- 

 BII sp., Auct. ; HTPOPELTIDIS sp., Sory; POLTPODII sp., Auct. ; DAVAL- 

 LLB sp., Auct.; TECTABI* sp., Cavanilles; POLTSIICHI sp., Auct.; 

 ARTHROPTEKIDIS sp., J. Smith. 



Sori indusiate, rotundate ; the receptacles terminal on the 

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

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

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

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

 thickened at the apices. 



