POLYPODIES POLYPODIUM. 119 



tered, stiff, nearly black hairs 1 to 2 mm. long; veins immersed, forked; 

 sori oblong, oblique, superficial, ultimately confluent. Epiphytic on mossy 

 trunks. 



Mount Apo, Mindanao, Copeland 1520 (Type), 1101. 



I conceive this to be the plant from the same locality, Warburg 14140, 

 determined by Christ as P. parasiticum Mett. "aut ei pro&imum;" and 

 would have let my plants bear the same name and doubt, but that 

 Mettenius' name is invalidated by P. parasiticum L. 



(3) P. Merrillii Copeland. Rhizome erect, short, clothed toward the 

 apex with light-brown scales; fronds minute, the largest 23 mm. high, 

 less than 2 mm. broad, linear-oblanceolate, obtuse, contracted gradually 

 to a very short petiole or sessile, coriaceous, with a pubescence of short, 

 straight red-brown hairs mostly confined to the upper surface and margin; 

 midrib conspicuous, veins simple, almost invisible; sori superficial, near 

 the midrib, and so large that they extend from near the margin to well 

 across it, forming a single wavy line, about 6 sori on a frond. 



Paragua, Merrill 754, growing on rocks along a small stream in the 

 mountains near the E-wi-ig River. 



(4) P. setigerum Blume. Rhizome erect or creeping, very short; stipes 

 densely clustered, 3 to 6 cm. high, slender, densely beset with spreading 

 cinnamon-colored hairs about 2 mm. long; fronds 15 to 25 cm. high, about 

 17 mm. broad, ligulate, obtuse or subacute, entire, herbaceous or subcoria- 

 ceous, sparsely clothed throughout with soft hairs like those of the rachis; 

 veins immersed, twice or three times forked; the sori round, large, super- 

 ficial, dorsal on the first acropetal branch of each vein. 



Mount Apo, Copeland 1000, 1059, 1204, epiphytic in the mossy forest. 

 Java and the Moluccas. 



(5) P. hirtellum Blume. Rhizome short-creeping scaly; frond 5 to 8 

 cm. long, one-tenth as broad, obtuse, entire, contracted gradually to the 

 short stipe, subcoriaceous, sparsely clothed throughout with long, soft, 

 brown hairs; veins hidden; sori in a single close row on each side of the 

 costa, nearer to it than to the margin. 



Luzon, Steere. 

 Java and Ceylon. 



(6) P. setosum (Blume, Christ). Stipes clustered on an erect rhizome, 

 wiry, hirsute, about 2 cm. high; fronds 9 to 13 cm. long, about 7 mm. broad, 

 narrowed toward both ends, but not acute, entire or very slightly wavy, 

 subcoriaceous, sparsely hirsute; veins once forked, not or but slightly 

 visible by reflected light; sori terminal on the short acropetal branch, 

 superficial, round. 



Luzon, Cuming 222; Mount Mariveles, Copeland 215; Mount Apo, 1,800 

 m.; Copeland 1008. 



Java, Celebes. 



The Davao plant is typical; that from Mariveles differs in having 

 longer hairs, more abundant near the margin, and veins quite invisible 

 by reflected light, the fertile ones of the broader fronds not infrequently 

 twice forked; but it is not safely separable. Neither can I distinguish 

 P. Hookeri Brack., also reported from the Philippines. 



