284 516. LEPTOLEPIA. 



laceo-herbaceous ; surfaces naked; colour olive-green, paler beneath; rachis, 

 coslae and costulae furnished beneath with scattered hairs; veins simple or 

 forked, lower veins pinnate, the veiulels simple or forked. Sori subglobose, 

 occupying the apex of the higher anterior veinlets, submarginal, placed on 

 subscariose, recurved, blunt or acute lobules; indusium transversally oblong, 

 fastened' by the apex of the veinlet only, whitish-yellowish, scariose, forming 

 with the lobule a 2-valved involucre to the sorus, the outer edge dilacerate, 

 the lacinulae piloso-fimbriate. 

 New Guinea. 



3S. HTJJMLA.TA., CavaniUes. 



Sori roundish or oblong, solitai-y and terminal on the veins or veinlets, 

 submarginal or somewhat remote from the margin. Indusium ± of the same 

 shape, fixed by a broad base at the inner side of the sorus, free at the sides, 

 opening outwardly (*). 



Rhizome scaly, creeping. Stipes ai'ticulate to the rhizome, scattered. 

 Fronds mostly divided; veins free. Diels, in Engl. & Prantl, Nat. Pfl.Fam., 

 I*, fig. 112. 



Paleotropical. 



Arrangement of the sections. 



§ 1. EUHUMATA. Indusium thick, coriaceous. 



§ 2. LEUCOSTEGIA. Indusium thin, membranaceous (Davallia, p. p., C. Chr., 

 Ind. Fil.). 



§ 1. EUHUMATA. 



a. 



Barren fronds simple, entire, crenate or toothed. 



^. Fertile fronds at best toothed. (1) H. angustala. 



>tc.>tc. Fertile fronds deeply pinnatiftd. (2) H. heterophylla. 



(') The genera Oleandra, DavalUa & IHlcrolepla have Ihe indusia sometimes 



more or less resembliog those ot Humata. 



