44 POLVrODlACl'LE OF THE THILIPriNE ISLANDS. 



elongate and proliferous; main veins evident about half way to margin, 

 areolae large, with few included veinlets; fertile pinnte much contracted, 

 entire or sinuate. This partly includes Achrostichum hlumeanum Hooker. 



Luzon, Cuming 223, 225; Rizal, holier; Lamao, Copeland 249. 



India, Burmah. 



(12) G. costata (Wall.) Bedd. Rhizome creeping, bearing subulate 

 scales; stipe 4.5 cm. or less high; frond 60 cm. or more long; pinn.T 

 reaching a length of 35 cm. and a breadth of 8 cm., stalked, acuminate, 

 entire, sinuate or erenate, subcoriaceous, glabrous; main veins very prom- 

 inent, close; areolae and included veinlets copious; pinnae of fertile frond 

 smaller and more coriaceous. 



"Manila," Gaudichaud. 

 Upper India, Burmah. 



(13) G. presliana (Fee). Rhizome woody, short-creeping; stipe 10 to 

 20 cm. high, firm, erect, naked; sterile frond about 30 cm. long, half 

 as broad, with numerous erecto-patent pinnt? 5 to 8 cm. long, 1 cm. broad, 

 entire, narrowed to both ends, submembranaceous, glabrous, lower ones 

 short-stalked; racliis winged above; venation as in Goniophlehium, veinlets 

 uniting in pairs, with one free veinlet in each areola; fertile fronds usually 

 with longer stipes and pinnae much contracted. 



Sorsogon, Haenke. 

 India. 



(10) DIPTERIS Reinwardt. 



Rhizome creeping, stipes not articulate to it; frond cleft to the base 

 into parts, which are dichotomously divided or lobed; main veins dichoto- 

 mous; veinlets anastomosing, with free included veinlets; sori small, round, 

 mostly along the main veins and cross veins, without indusia. Striking 

 terrestrial ferns of large size, fan-shaped or reniform in general outline. 



(1) D. conjugata (Kaulf. ) Reinw. Rhizome covered with dark brown, 

 linear scales; stipe usually 1 m. or more high, firm, brown, naked, polished; 

 frond usually more than 30 cm. high and much broader, the halves lobed 

 at least two-thirds of the way down, their divisions successively more 

 shallowly, segments acute, coarsely or obscurely serrate, subcoriaceous, 

 glabrous, dark green above, glaucous and bluish beneath; main veins very 

 conspicuous, areolae copious. 



Luzon, Cuming 155, Steere; Benguet, ISIariv^eles, and Laguna, Loher; 

 Baguio, Topping 164, 238, Elmer 5782; Mount Mariveles, Merrill 3228, 

 Whit ford 250; Davao, Warburg 14185. 



Malaya to Formosa and Polvnesia. 



