ASPIDIUM. 39 



lowest pinnae very large, obliquely deltoid, pinnules on its basiscopic side 

 prolonged, and at least deeply pinnatifid in turn; veinlets anastomosing 

 at least near the midribs, without sterile included veinlets; indusia 

 subcorda^e. I suppose that Xephrodium (Pleocnemia) giganteum Baker 

 is our Philippine plant; if it is distinct from A. giganteum Blume, Baker's 

 name can not stand. 



Leyte, Cuming?; Camarines and Albay, Baranda. 



(23) A. heterophyllum Mett. Ehizome creeping; stipe 5 to 10 cm. 

 high, densely villous; frond 10 to 15 cm. high, linear-oblong, simple, with 

 obtuse, oblong, slightly falcate lobes reaching one-fourth of the way to 

 the costa, coriaceous, villous on both surfaces, but especially on the 

 margin and costa beneath; anastomoses of the veinlets not very regular, 

 but suggesting Goniopteris; sori midway the veins and the margin of the 

 lobes. Apparently related to Nephrodium canescens. 



Samar, Cuming 322. 



(24) A. ambiguum (Hooker) Diels. Stipe slender, nearly naked; frond 

 40 to 60 cm. high, 30 cm. broad, oblong-deltoid, bipinnatifid; pinnae lance- 

 olate, 10 to 15 cm. long, 3 cm. broad, the lower ones slightly stalked, 

 cut half way or more to the rachis into linear-oblong lobes, the fertile 

 ones contracted, thinly herbaceous, dark green, rachis and both sides thinly 

 clothed with long, jointed hairs; veinlets of the lobes often forked, the 

 lower ones forming costular areolae; sori oblong, confluent when the veins 

 fork; indusium none. 



Luzon, Cuming 154 (Samar, Cuming 321?). 



(25) A. leuzeanum (Presl) Kunze. Rhizome erect, usually short but 

 sometimes arborescent, densely scaly at the crown; stipe 1 m., more or less, 

 long, stout, striate; frond 1 to 2 m. long, subdeltoid; pinnae 30 to 50 

 cm. long, 15 to 25 cm. broad, upper ones simple, lowest ones pinnate on 

 the basiscopic side, and the large pinnules pinnatifid; segments 10 cm. 

 long, 2 to 3 cm. broad, subfalcate, entire or sinuate; veinlets anastomosing 

 sparsely and irregularly, rarely free; sori in single close rows; indusia 

 orbicular-cordate, fugacious. 



Luzon, Cuming 33, 34, 107; Rizal and Laguna, Loher; Mindanao, 

 Cuming 289. 



India and China to Polynesia. 



(7) POLYBOTRYA H., B. and K. 



Fronds at least pinnate, the fertile much contracted; veins free in the 

 Philippine species; sori originating in a receptacle on the veins, almost 

 or entirely covering the under surface, exindusiate. Our species are rather 

 small terrestrial ferns. 



1. Pinnae not articulate to rachis. 



2. Setae projecting between teeth .' (1) P. appendiculata 



2. Without setae. 



3. Frond bipinnatifid (2) P. stenosemioides 



3. Frond bi- or tripinnate (3) P. apiifolia 



1. Pinnae articulate to rachis .... _ (4) P. articulata 



