46 POLYPODIACEJE OF THE PHILIPPINE ISLANDS. 



(1) A. glabra Copeland. Rhizome wiry, climbing 3 m. high on tree 

 trunks, sparsely clothed with black appressed scales or their bases; stipes 

 about 5 mm. high, articulate well above the rhizome; frond 20 to 30 

 cm. high, 5 to 7 cm. broad, pinnate, with a terminal pinna rather 

 larger than the others; lateral pinnae about 8 mm. broad, obtuse, or the 

 upper ones subacute, obscurely crenate, slightly auricled, the upper side 

 abruptly truncate, the lower very oblique at the base, papyraceous, gla- 

 brous, remaining green when dried; sori orbicular, in a row a little 

 nearer the margin than the costa; indusium fixed by a very narrow sinus, 

 persistent. 



E-wi-ig River, Paragua, Merrill 740. 



(2) A. ramosa (Beauv. ) J. Sm. Stipes very short, scattered, on a 

 slender, wiry, wide-creeping rhizome; frond 15 to 30 cm. long, 3 to 7 

 cm. broad; pinnae 1 to 3 cm. long, 1 cm. broad, slightly crenate, the 

 upper edge auricled and truncate, parallel with the stem, the, lower 

 oblique; texture papyraceous; rachis and both sides slightly villose, the 

 whole plant turning blackish when dried; indusium roundish, very 

 fugacious. 



Luzon, Cuming 101; Basilan, Steere. 

 Africa to Samoa. 



(12) NEPHROLEPIS Schott. 



Fronds pinnate; pinnae articulate to the rachis but rachis not articulate 

 to the rhizome; sori on the back of the pinnae, near the margin or remote 

 from it, in a row parallel to it, reniform, varying from broadly so to 

 orbicular^ The most of our species are terrestrial with erect caudices 

 above the ground, supported by braces which also function as roots and 

 runners. 



1. Indusium with broad sinus, opening toward apex of pinna (1) IV. cordifolia 



1. Indusium with deep sinus, opening obliquely toward margin. 

 2. Rhizome short. 



3. Frond nearly glabrous (2) N. exaltata 



3. Frond hirsute (3) N. Mrsutula 



2. Rhizome scandent (4) N. volubilis 



1. Indusium orbicular-reniform, attached at top of sinus or sub- 

 peltate. 



2. Rachis nearly glabrous, sori far from margin (5) N. acuta 



2. Rachis tomentose, sori near margin. 



3. Pinnae hirsute (6) N. rufescens 



3. Pinnae glabrous (7) N. barbata 



(1) N. cordifolia Presl. Caudex suberect or oblique, the wiry fibers 

 from it often bearing tubers; stipes tufted, wiry, 5 to 15 cm. high, 

 naked or scaly; fronds 15 to 40 cm. long, 2.5 to 3.5 cm. broad; pinnae 

 close, often imbricate, obtuse, entire or nearly so, the base cordate or 

 rounded on the lower side, with a short, sharp auricle on the upper, 

 subcoriaceous, nearly glabrous; sori large, in a row midway between 

 midrib and margin; indusium broad, firm, opening toward the apex of 

 the pinnae or somewhat obliquely. 



