70a. BRAINEA. 343 



(1) B. insigniis, JBfc., Hk. Bk., Syn., FiL, 390; Hk., Fil. Exot., 

 tab. XXXVIII; Diels, in Eng. & Prantl, Nat. Pfl.fam., I'', fig. 132 E—F\ 

 Bedd., Ferns Br. I., I, tab. CXXXIX. 



Trunk 60—120 cm. high, T'/^— 10 cm. thick, clothed with shaggy, 

 linear, brown or ferrugineous scales 2 — 2'/2 cm. long. Stipes firm, 7 '/j — 10 

 cm. long, naked, scaly only at the base. Fronds Lomaria-like, + 50 — 100 

 cm. long, 15 — 30 cm. broad, simply pinnate or partly 2-pinnate. Pinnae 

 close, numerous, linear-subulate, 5 — 10 mm. broad at the often cordate- 

 auriculate base, serrate or serrulate, the fertile ones often the narrowest. 

 Texture coriaceous; rachis and both surfaces naked. Sori at length filling 

 up nearly the whole under surface of the fertile pinnae when contracted. 



Pulo Sembilan, Mindoro (?); South China, Tonkin, Burmah, Khasya. 



7^1, I^OLYPOOITJIVI, JAnn^. 



Sori i-ound or oblong, several to many on each side of the costa, 

 superficieal or sunk in cavities, dorsal or terminal on free veins or vein- 

 lets or uniting the apices of free veinlets, sometimes protected by the 

 recurved or reflexed margin of the frond or immersed in saccate or 

 indusium-like, marginal or submarginal depressions of the frond, the 

 oblong ones parallel or generally more or less obUque to the costa or the 

 margin. No indusium. 



Rhizome creeping or erect. Stipes as a rule articulate to the rhizome, 

 the articulation often indistinguishable in the smaller species ('). Fronds 

 simple, incised or pinnate, rarely more compound ; surfaces naked, scaly 

 or hairy, the hairs not stellately branched ; veins free, if anastomosing, 

 the areolae regular, with the included free veinlets running in the 

 direction of the margin. 



(1) Not only of late, but also formerly, some species of Polypodium and Pleopeltis 

 with non-articulated stipes have been found; it is, moreover, a well-known fact that 

 in the smaller species of the said genera -the articulation is often not observable- 

 Consequently one of the main points of diffence between those two genera and Pheg- 

 opteris and Dictyopteris, i. e. the articulated or non-articulated stipes, partly dissapears. 



For this reason the unarticulated species of Polypodium and Pleopeltis logically 

 ought to be classified among those of Phegopteris and Dictyopteris. There is, however, 

 such a great difference of habit and mode of growth between the two former and the 



