544 40. PLAGIOGYHIA. 



at the base of the pinnae. Knnae 30 — 40-jugate, nearly horizontal, the largest 

 ± 1 74 c.M. broad, the J)ase acute, - the edge entire, the apex acuminate, 

 serrate; lower pinnae short-stalked, higher adnate, highest confluent. Texture 

 papyraceous; surfaces naked; veins conspicuous, simple or forked. Fertile 

 fronds narrower, the pinnae spreading, ±11 c.M. long, + 2 — 3 m.iM. broad. 

 Luzon. 



41. FELLA F: A., Idnk. 



Sori intramarginal, either dot-like to oblong, solitary and terminal on the 

 veins, but soon running into a submarginal line or linear, placed on a sub- 

 marginal receptacle uniting the vein tips. Indusia roundish, contiguous or 

 linear, consisting of the reflexed, modified margin of the frond. 



Rhizome more or less creeping. Stipes seriate, not articulate to the 

 rhizome, with a singlCi 2 — 4-archous vascular strand (\/, Y, X)- Fronds 

 divided ; leaflets mostly + _ stalked, more or less distinctly articulate, not adnate 

 at the base; veins free or sometimes anastomosing, the apices not or hardly 

 thickened. Diels, in Engl. & Prantl, Nat. Pfl.Fam., I*, fig. 142. 



Trop. Asia, Austi-alia, Polynesia, America, Africa. 



Arrangement of the sections. 



% 1 . PLATYLOMA. Sori terminal on the veins, free, but soon running into 

 a submarginal line. Veins always free. Diels, 1. c, fig. 142, B. 



§2. PTERIDELLA. Sori linear, on a submarginal receptacle uniting the vein 

 tips. Veins free in malayan material. Diels, 1. c, fig. 142, F. 



§ 1. PLATYLOMA. 



•$•. Fronds simply pinnate. 



X. Stipes scattered. Lower pinnae not or hardly reduced. (1) P. falcata. 



x.x. Stipes luffed. Lower pinnae much reduced. (2) P. Zippelii. 



■i-.-ir. Fronds more compoundly divided. (3) p. pteroides. 



