﻿25. MESOCHLAENA. 253 



Wav. borneensis : Upper surface naked exept on the costae ; under 

 surface copiously and minutely short-hairy; indusium covered with yellow, 

 minute, globose glands. 



Malacca; — var. borneensis: Borneo (Hallier No. 2704). 



S4. LXJER.SSE]VI^\., Kuhn. 



Sori oblong, terminal on included, excurrent, free veinlets, alternate, in 

 several rows on each side of the costa. Indusium oblong, attached by its 

 longitudinal axis, opening all round the edge. 



Rhizome erect. Stipes not articulate to the rhizome. Fronds simple, 

 slightly dimorphous, the fertile ones a little narrower and longer stalked than 

 the barren ones ; veins anastomosing, forming several rows or areolae ; areolae 

 with free veinlets, which are more copious in the barren than in the fertile 

 fronds. Sori solitary in the areolae of the fertile fronds. Diels, in Engl. & 

 Prantl, Nat. Pfl.Fam., 1\ tig. 93, A— B. 



Sumatra. 



Mj. Kehdingiana, Kuhn, Bot. Centralbl., XI, 77; Diels, in 

 Engl. & Prantl, Nat. Pfl.Fam., P, tig. 95, A & B; Aspidium Kehdingianum, 

 Liierss., Christ, Parnkr. d. Erde, 235. 



Barren fronds ± 30 c.M. long, ± 5 cM. broad, lanceolate, the apex 

 acute, acuminate or bluntish, the base gradually narrowed, the stipe 4 — 5 

 c.M. long. Texture papyraceous or chartaceous; main veins flexuose, distinct 

 to the edge; areolae with free veinlets. Fertile fronds linear-lanceolate, 

 + 20 — 25 c.M. long, + 2 c.M. broad, narrowed gradually towards both ends, 

 the base decurrent, the stipe ± 20 c.xW. long; no distinct main veins; 

 areolae numerous, hexagonal. Sori terminal on the excurrent, free veinlets; 

 indusium elliptical or oblong; 



Sumatra. 



25. .i?b.SI*I13IXJ31, Stvttf-tie. 



Sori roundish, rarely oblong, compital (*) or on free veinlets. Indusium 

 round or reniform, attached by a central point or at the apex of a ± deep 



(*) On connected veinlets. 



