﻿284 31fc. LEPTOLEPIA. 



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

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

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

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

 subscariose, recurved, blunt or acute lobules; indusiura Iransversally 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. 



32. H:UM:.^Tj\., Cavanaies. 



Sori roundish or oblong, solitary 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 articulate to the rhizome, scattered. 

 Fronds mostly divided; veins free. Uiels, in Engl. & Prantl, Nat. PIl.Fam., 

 I*, fig. 112. . 



Paleotropical. 



Arrangement of (he 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. 



Jf^. Fertile fronds at l)est toothed. (1) H. angustata. 



*.>tc. Fertile fronds deeply pinnatifid. (2) H. heterophylla. 



(*) The genera Oleandra, Davallia & MIcrolepla have the indusia sometimes 



more or less resembhng those of Humata. 



