﻿75. DRTMOGIOSSUM. 703 



edge, soon filling up nearly the whole under surface of the frond, covered 

 by numerous stalked peltate scales when young. 

 Amboyna, Philippines; Formosa, North. India. 



* (2) O. heterophyllum, C. Chr., Ind. Pil.; D. piloselloides, Pr., 

 Rac, Flor. Btz., I, 61; Bedd., Ferns S.I., tab. LV; Hk., Gard. Ferns, tab. 

 XLVr, D. carnosum, Rac. (not Hk.), I.e., 62; Niphoboliis nummidarifolius, Bedd., 

 1. c, tab. CLXXXVI ; Acrostichum heterophyllum, L., (oldest name). 



Rhizome wide-creeping, slender, the scales dense, roundish, oblong or 

 laciniate. Fronds dimorphous. Barren fronds roundish or oblong, subsessile 

 or short-stalked, 1 — 5 c.M. long, 1—2 c.M. broad, the apex rounded, the 

 edge entire, the base more or less obliquely truncate or cuneate. Texture 

 coriaceous ,or fleshy ; surfaces covered with scattered, deciduous stellate hairs, 

 especially when young; veins immersed; areolae with free veinlets. Fertile 

 fronds 5—10 c.M. long or longer, 5 — 8 m.M. broad, on stipes to 2 c.M. long. 

 Sori in a broad, submarginal line, not rarely filling the whole under surface 

 of the fertile fronds in the narrowest forms; capsules mixed a few stellate, 

 pedicellate hairs. 



Trop. Asia. 



* (3) ». rigidum. Hie., Hk. Bk., Syn. Fil., 398; Hk., Icon. PI., X, 

 tab. CMXCVI. 



Rhizome firm, wide-creeping, the scales dense, lanceolate-subulate, brown- 

 ish. Fronds dimorphous, the barren ones I'/a — S'/i c.M. long, oblong, the 

 apex rounded, the base ±- cuneate, the edge entire, thickened, on firm stipes 

 to + 2'/2 c.M. long; fertile fronds 10 — 15 c.M. long, nearly semiterete, + 3 

 m.M. broad, narrowed into a stipe + 10 — 15 c.M. long. Texture very thick 

 and rigid; surfaces naked; main veins hidden; areolae without free veinlets. 

 Sori sunk in a deep groove between the midrib and edge. 



Borneo. 



(4) BJ. novo-guineae, Christ, Schum. & Laut., Flor. deut. Sch. 

 geb., 137. 



Rhizome wide-creeping, the scales at first white, afterwards reddish- 

 brown, subulate, dense, subadpressed. Sterile fronds scattered, on stipes 3 — 4 

 c.M. long, naked, ovate-elongate, + 8 c.M. long, + 3 c.M. broad, the apex 

 acute, the base narrowed, the margin entire, cartilagineous. Texture thick, 

 rigidly coriaceous; costa conspicuous; veins inconspicuous near the margin; 



