POLYPODIES XIPHOBOLUS. 115 



fertile frond about 3 cm. high, 6 mm. broad, widening toward the rounded 

 apex, contracted gradually to the stipe; veins invisible; sori covering 

 the entire back. 



Luzon, Cuming 246; Rizal Loher; Mount Arayat, summit, Merrill 3819; 

 Mount Mariveles, Merrill 3757; Davao, Copeland 094 (along beach), 934. 



India to Celebes. 



(9) N. samarensis (Presl). Rhizome firm, wide-creeping, clothed with 

 deciduous, spreading, white, linear scales; stipe 3 to 10 cm. high, firm, 

 erect; frond 30 to 60 cm. high, 1 to 2 cm. broad, coriaceous, upper surface 

 naked, lower with dense whitish tomentum; veins invisible by reflected 

 light, anastomosing irregularly; sori confluent, occupying the whole surface 

 of the contracted upper half of the frond. 



Samar, Cuming 323 in part; Albay, Baranda; Arayat and Mariveles, 

 Loher. 



(10) N. angustatus (Sw.) J. Sm. Clothed with linear deciduous scales; 

 stipe 6 to 10 cm. high, strong, erect; frond 15 to 30 cm. high, 2 to 5 cm. 

 broad, very coriaceous, upper surface naked, lower clothed with appressed 

 subferruginous tomentum; veins invisible by reflected light, forming fine 

 irregular areolse; sori large, on the upper third of the frond, near the 

 margin, sometimes confluent. 



Luzon, Cuming. 



India to Tahiti and New South Wales. 



(11) N. splendens J. Sm. Rhizome short, fibrillose; fronds tufted, 

 sessile or nearly so, 30 to 40 cm. high, one-fourth as broad, obtuse, attenuate 

 to base, coriaceous, upper surface with appressed scattered cottony fibers, 

 lower with dense ferruginous tomentum; main veins distinct and evident 

 to the margin, with straight cross-veinlets, the areolse thus formed divided 

 into a few smaller ones, with a few free veinlets running in any direction; 

 sori confluent, confined to the upper part of the frond, not reaching the 

 margin. 



Rizal, Loher; Sorsogon, Baranda; Samar, Cuming 331; Davao, Copeland 

 684. 



(54) POLYPODIUM Linnaeus. 



Fronds articulate to the rhizome, the fertile and sterile rarely different, 

 the sterile always green, glabrous or the pubescence not stellate; sori 

 dorsal on the frond, dorsal or terminal on the veins, or on their anas- 

 tomoses, without indusia. A very large genus, including ferns of every 

 habitat, the Philippine species never bipinnate. The preceding and the 

 four following genera are derived from Polypodium, and intimately related 

 to some of its sections. The subgenera are sometimes regarded as genera, 

 as also have been various minor divisions not recognized at all in this 

 arrangement, but all are very intimately related, and their separation 

 costs as much as it gains in convenience, beside demanding many new 

 names. 



1. Veins all free Eupolypodium 



1. Veins anastomosing to form regular areolse, each with a single 

 free included veinlet running toward the margin and bearing 

 the sorus Goniophlebium 



