98 POLYPODIACEJE OF THE PHILIPPINE ISLANDS. 



spreading, 10 to 15 cm. long, separated by about their own breadth, con- 

 tracted toward the base, acuminate and finely toothed toward the apex, 

 coriaceous, glabrous, as is true of the other species, except when very young; 

 pinna of the fertile frond more distant, short-stalked, with a gland at the 

 base ; indusium at first conspicuous, brown. 



Mount Data, Lepanto, Loher. 



India and Malaya ( the typical form ) . 



(3) P. glauca (Blume) Mett. var. philippinensis Christ. Stipe 30 cm. 

 high, naked, erect; frond ovate, 30 to 60 cm. high, 15 to 25 cm. broad; pinnae 

 separated by as much as their own breadth, linear, erecto-patent, 10 cm. 

 more or less, long, acute, minutely serrulate, contracted to the base, coria- 

 ceous; terminal pinna like the lateral; lower surface glaucous; fertile 

 frond similar except that the pinnae are more distant and narrowly linear. 



Mount Data, Lepanto, Loher. 



India, Java, Celebes (the typical form). 



(41) ONYCHIUM Kaulfuss. 



Rhizome creeping, chaffy; stipes light colored; frond finely divided, 

 fertile and sterile divisions more or less unlike; veins free except as the tips 

 of the veins of the fertile divisions are connected by an intramarginal 

 strand, on which the sorus is formed; indusium formed by the inflexed 

 margin, broad enough to reach the costa, or nearly so. A small genus, 

 differing from Pteris in the finely dissected frond and broad indusium. 



(1) O. japonicum (Thunb.) Kunze. Rhizome wide-creeping, densely 

 beset with lanceolate-subulate brown paileae; stipes 15 to 30 cm. high, naked, 

 stramineous or pale brown; frond 20 cm. or more high, ovate. 4- to ," 

 pinnatifid; pinnae and pinnules of all orders except the ultimate segments 

 deltoid, with few divisions; ultimate divisions linear-cuneate, about 5 mm. 

 long, trifid at the apex of the sterile segments, the fertile very acute, 

 herbaceous or subcoriaceous, glabrous; sori light brown. 



Benguet, Loher, Topping 159, 323. 

 Japan to India and Java. 



(2) O. auratum Kaulf. Rhizome short, densely scaly; stipes clustered, 

 stout, erect, naked, dull brown, 20 to 30 cm. high, those of the sterile fronds 

 shorter; fronds dimorphous, the sterile 15 to 20 cm. high, the fertile 20 to 

 30 cm. both ovate, quadripinnate, pinnae and pinnules mostly deltoid, with 

 few divisions ; ultimate segments of sterile frond minute, 3 mm. long, linear- 

 cuneate, trifid or entire, thin-coriaceous, glabrous; segments of fertile 

 frond 10 to 20 mm. long, 1 to 2 mm. broad, entire, .cuspidate, given a pod- 

 like appearance by the broad indusia; sori bright golden yellow. 



Luzon, Cuming 38, Lobb 452; Isabela-Luzon, Warburg 11605, 12749, 

 12750; Nueva Ecija, Merrill 286; Benguet, Topping 173, 216, Elmer 5950; 

 Manila, Chamisso, Loher, Warburg; Masbate, Baranda. 



India and Malaya. 



(42) PTERIS Linnaeus. 



Stipes not black and polished, traversed by a single fibro-vascular bundle : 

 frond at least pinnate, lowest pinnae usually the most developed, especially 



