404 71a. PLEOPELTIS. § 2. selliguea. 



those of the fertile fronds the longest. Barren fronds lanceolate, ± 8 — 25 

 cm. long, 2—5 cm. broad, acuminate, entire, decurrent at the base. 

 Texture membranaceo-papyraceous, more or less pellucid ; costa prominent 

 below; both surfaces naked; mains veins oblique, + 4 — 8 mm. apart, 

 not reaching the margin; areolae nearly regular, with free included vein- 

 lets. Fertile fronds linear-lanceolate, ± 7'/2— 20 cm. long, + 5 — 10 mm. 

 broad, acuminate, decurrent at the base. Sori very oblique, reaching 

 from the costa to the margin. 

 Borneo. 



(227) PI. iiiaci*0|ihylla, n. A. ». n.; PI. regularise v. A. v. B. 

 and PL selliguea., v. A. v. i?., p. p. ; Polypodium macropliyllum, Reimv., 

 C. Chr., Ind. Fil. ; P. regulare, Mett. and P. selliguea, Mett., C. Chr., Ind. 

 Fil., p. p.; var. Backeri, v. A. v. R., in Bull. Btz., 1913, XI, 50; P. 

 selliguea, Mett., var. Backeri, v. A. v. R., MvS. in Herb. Bog. 



Rhizome creeping, the scales lanceolate, acuminate, red-brown to black. 

 Stipes seriate, — 20 cm. long, slender or stout, nudate or marginate to 

 broadly winged. Fronds elongate-lanceolate, + 10 — 65 cm. long, 1—15 

 cm. broad, blunt to acuminate, entire or nearly so, the base cuneate or 

 gradually decurrent. Texture flaccido-coriaceous or membranaceous; sur- 

 faces naked ; costa prominent ; main veins fine and indistinct to stout and 

 prominent, more or less zigzag; areolae regularly subquadrangular or 

 subhexagonal, with free veinlets. Fertile fronds similar to the barren 

 one or sometimes much shorter and broadly lanceolate. Sori in oblique 

 or subhorizontal, single, parallel, continuous or even much interrupted lines 

 between the main veins. — Several forms united by intermediates. 



Forma typica: Rhizome scales acute or acuminate, dull-brown; fronds 

 mostly middle-sized, to 50 cm. long and 10 cm. broad, mostly very 

 narrowly decurrent at the base; fertile fronds as large as the barren 

 ones or nearly so; veins commonly prominent. 



Forma regularis : Like the type but the fertile fronds i half as large 

 as the barren ones. 



Forma selliguea: Like the type but the rhizome scales black or 

 blackish-brown; fronds mostly small, not variegated; veins often hidden, 



Forma Backeri: Like forma selliguea but the fronds variegated with 

 silvery-white patches especially when young. 



Forma magna: Rhizome scales finely long-acuminate, ferrugineous ; 



