100 POLYPODIACEiE OF THE PHILIPPINE ISLANDS. 



acuminate, entire, truncate or cordate or subauricled at the base, subcoria- 

 ceous, glabrous; rachis naked or slightly scaly; veins close and fine, usually 

 once forked; indusiuni membranous, yellowish brown. 



Luzon, Cuming 6; Cagayan-Luzon, Warburg 12214; Benguet, Loher, Manila, 

 Loher, Warburg; Camarines, Albay, and Catanduanes, Baranda; Zamboanga, 

 Challenger Exp. 



Tropical and warm-temperate lands, everywhere. 



(3) P. cretica L. Rhizome short-creeping; stipes 15 to 30 cm. high, 

 erect, wiry, naked, polished, pale; frond 15 to 30 cm. high, 10 to 20 cm. 

 broad; pinnse 2 to 6 pairs, the upper sometimes decurrent, ascending, the 

 fertile narrowly linear, sterile broader, spinulose-serrate, the lowest pair 

 usually cut about to the base into 2 to 3 linear pinnules, subcoriaceous, 

 glabrous; veins fine, close, parallel, simple or forked; indusiuni membranous, 

 pale. 



Rizal, Loher; Mount Mariveles, Merrill 3122; Masbate, Baranda; Davao, 

 Copeland 700. 



]\Iost warm countries; exceedingly variable. 



Pteris stenophylla Hook, and Grev. is a varietj' with 3 to 5 pinnte 

 clustered at the apex of the stipe, collected on Gorregidor by Cuming, No. 

 283, known also from India. 



(4) P. melanocaulon Fee. Rhizome erect, small; stipe slender, naked, 

 black, shining, fragile: total height 25 to 30 cm.; frond ovoid, pinnate, with 

 the basal pinnae forlced to the base ; pinnae stalked, linear, arcuate, sterile 

 toward the apex and crenate, acuminate, membranous, glaucous; venation 

 obscure, indusiuni broad. Treated as a variety of P. cretica in Synopsis 

 Filicum. 



Isabela-Luzon, Warburg 11972; Benguet, Elmer 6160 ( ?) ; Rizal, Loher; 

 Catanduano^,, Baranda ; Jolo Archipelago, Burhidge; Davao, Warburg 14121. 



(5) P. pellucida Presl. Stipe 30 cm. or more high, erect, naked, stra- 

 mineous, frond 30 to 60 em. high, ovate-lanceolate, simply pinnate, or the 

 lowest pinnae forked; pinnae 3 to 6 pairs, sessile, linear, entire or serrulate 

 toward the point, upper ones slightly decurrent, coriaceous, bright green, 

 often glossy; veins conspicuous, fine, close, simple or forked; indusium 

 membranous, broA\Tiish. 



Luzon, Eaenle, Cuming 85; Benguet, Loher. Merrill's No. 3772, from the 

 Lamao Forest Reserve, may be this or a form of P. longifolia with the lowest 

 pinnae forked. 



Guinea, India, Malaya. 



(6) P. ensiformis Burman. Rhizome short, creeping; stipe of sterile 

 frond 5 to 10 cm. higli, of fertile, 10 to 30 cm. slender, erect, naked, stram- 

 ineous; sterile from 10 to 15 cm. high, 3 to 8 cm. broad, bipinnatifid or 

 bipinnate, the segments with rounded, dentate apex, obovate, about 10 mm. 

 long; fertile frond 20 to 30 cm. high, pinnate; pinnae entire or the lower 

 pinnatifid, 8 to 15 cm. long, linear, sterile apex serrate, upper ones adnate at 

 base, herbaceous, glabrous; veins usually forked, not conspicuous. Exceed- 

 ingly variable. 



Luzon, Cuming 45, 46; Manila Loiter, Warburg 12745, Marave; Mindoro, 



