o 



6 rOLYrODIACE^E OF THE PHILIPPINE ISLANDS. 



(8) A. heterodon Copeland. Rhizome short, erect, woody; stipe 15 to 

 20 cm. high, glabrescent, bearing on each side a wing about 5 mm. broad 

 at the top, attenuate to the base; frond 20 to 30 cm. high, 3 or 5 partite, 

 herbaceous, glabrous; apical segment oblanceolate, 4 to 5 cm. broad, acu- 

 minate, serrate with irregular teeth to 10 mm. long; lateral lobes smaller, 

 erecto-patent, less conspicuously serrate; primary veins reaching the 

 margin; areolae irregular with free included veinlets; sori large, in rows 

 along the main veins; indusiuni reniform, persistent. 



Terrestrial in forest near Catalonan, Davao, Copeland 951. 



(9) A. decurrens Presl. Rhizome creeping; stipe with a few scattered 

 paleae, and on each side a wing 5 to 10 mm. broad at the top attenuate 

 almost to the base; frond 50 to 100 cm. high, 30 cm. or more broad, cut 

 down to a broadly winged axis into 4 to 8 pairs of usually crenate lance- 

 olate segments 10 to 20 cm. long the lowest of which are sometimes 

 forked, herbaceous, glabrous; main veins distinct to the margin; areolae 

 copious, with free included veinlets; sori large, in regular rows along 

 the main veins; indusia reniform. 



Luzon, Cuming 148; Rizal, Loher ; Sorsogon and Catanduanes, Baranda; 

 Mindoro, Merrill 1773; Davao, Copeland 967. 

 India to Polynesia. 



(10) A. persoriferum Copeland. Rhizome short, ascending; stipe 40 

 to 60 cm. high, stramineous or brown, clothed at the base with lanceolate, 

 arciiate palese 12 mm. long, glabrous above, like the rachis; frond 30 

 to 50 cm. high, ovate, pinnate, the sterile the more ample; apical part 

 about 25 cm. high, 7 em. broad, acuminate, entire or subrepand, subcoria- 

 ceous, glabrous; lateral pinnae about 3 pairs, sessile, erecto-patent, subar- 

 cuate, lanceolate, 15 to 20 cm. long; fertile pinnae smaller, about 10 cm. 

 long, 2 cm. broad, obscurely crenate, the lowest stalked; main veins almost 

 reaching the margin; areolae irregular with free included veinlets; sori 

 in rows along the main veins, almost covering the entire lamina; indusium 

 reniform, very persistent. 



River bank near Catalonan, Davao, Copeland 929. 



(11) A. pachyphyllum Kunze. Rhizome short, apparently erect; stipe 

 30 cm. or more high, brownish, naked; from 60 to 100 cm. high, half as 

 broad, with a subdecurrent terminal part deeply pinnatifid at its base 

 and entire or sinuate above, and 4 to 8 erecto-patent lateral pinnae on 

 each side, acuminate, subcoriaceous, glabrous, the lower ones with a long 

 fork on the lower side; main veins almost reaching the margin; free 

 included veinlets copious; sori large, in fairly regular rows; indusium 

 reniform. {A. platyphyllum Presl.) 



Cuming, Luzon, 224; Cebu, 339 and 340; Panay (?) 356 in part; Min- 

 danao, 290; Benguet, Topping 337, 338; Elmer, 6171. 

 Malaya and Polynesia. 



(12) A. grande J. Sm., Mett. Stipe rufescent, shining; frond 1 m. 

 high, pinnate: apex deeply 3-lobed, composed of "three confluent pinnae;" 

 pinnae 5 to 6 pairs, 25 cm. long, 6 cm. broad, oblong-lanceolate, caudate- 

 acuminate, subsinuate, membranaceous, glabrous, the lowest stalked, 



