POLYPODIES POLYPODIUM. 1 27 



those of the fertile fronds the higher, straight or crooked, stramineous, 

 glabrous; fronds somewhat dimorphous, the sterile 3 to 10 cm. long, 

 lanceolate or ovate, obtuse or acute, entire, rounded or cuneate at the 

 base, coriaceous, glabrous, the fertile frond usually longer and narrower; 

 main veins conspicuous very nearly to the margin, areolse invisible; sori 

 moderately large, in two rows between each two main veins, round, 

 superficial. Including P. rupestre Blume, this species varies exceedingly 

 in the size and shape of the fronds. 



Luzon, Cuming 245; Benguet, Loher, Topping 149; Arayat, Loher; 

 Mount Mariveles, Barnes 346, Whitford 126, Copeland 1391. 



Malaya and Polynesia. 



(44) P. membranaceum Don. Rhizome stout, clothed with ovate, 

 membranaceous scales; stipe short, winged, erect, firm; frond 30 to 50 

 cm. high, about 8 cm. broad, narrowed gradually toward both ends, 

 repand or entire, very thin; main veins distinct, with very copious fine 

 areolae with free veinlets; sori mostly in two rather irregular rows near 

 the main veins. 



Philippines, fide Baker, Ann. of Bot. 5:477; Baguio, Elmer 5873, Topping 

 226, 263. 



Ceylon to west China. 



(45) P. Zippelii Blume. Rhizome creeping, clothed with thin, lance- 

 olate, squarrose, brown scales; stipes short and stout; fronds about 30 

 cm. high, 4 to 5 cm. broad, acute, decurrent below, entire or nearly so, 

 submembranaceous, glabrous; venation very evident; sori mostly in rows 

 along the main veins. 



Philippines, Steere; Sorsogon and Masbate, Baranda. 

 Java. 



As originally described this species is very doubtfully distinct from the 

 preceding. 



(46) P. heterocarpum Blume. Rhizome wide-creeping, clothed with 

 squarrose, linear, dull brown scales; stipes 30 cm. or more high, angular, 

 winged above ; frond 30 cm. or more long, oblong-lanceolate, subacute, 

 attenuate below, repand, thin but firm, glabrous; main veins distinct, 

 areola? rather ample; sori more or less in rows parallel to the main veins, 

 irregular in shape. 



Benguet and Rizal, Loher; Davao, Copeland 96*2, 965, 1251. 

 India to Borneo. 



(47) P. hemionitideum Wall. Rhizome woody, hypogaeous ; stipe about 

 10 cm. high, firm, erect; frond 20 to 50 cm. high, 10 cm. or less broad, 

 narrowed to both ends, entire, subcoriaceous, glabrous; veins very evident, 

 main ones not quite reaching the margin, areolae rather large; sori large, 

 irregularly arranged. 



Isabela, Luzon, Warburg 11603, 11621; Mariveles, Warburg 11527. 

 India and south China. 



(48) P. musaefolium Blume. Rhizome woody, with ovate, dull brown 

 scales; stipe about 1 cm. high, very stout; frond over 1 m. high, 15 cm. 

 broad, oblanceolate, obtuse, nearly entire, broad to the base, coriaceous, 



