POLYPODIE.E — IM )LYPODIUM. 1 25 



frond :i to S cm. liigli, lower broad part sterile, upper part contracted 

 and soriferous; sori rather large, round, in single rows, often confluent, 

 and covering the apex of the frond. 



Luzon, Steere; Benguet, Elmer 6128; Arayat, Merrill 3817; Mount Mari- 

 veles, Loher, Merrill 3225, 3750, Whitford 314; Mount Apo, DeVore and 

 Hoover 325, Copeland; the Mount Apo plants are larger than those from 

 Liizon. 



Malaya and Polynesia 



{'.V.\) P. hammatisorum Harrington, Journ. Linn. Soc. 16(1878) :32. 

 Rhizome long and slender, clothed with membranous, long-lanceolate, light 

 brown scales; stipes scattered, those of the sterile frond 1 to 4 cm. high, 

 of the fertile 3 to 7 cm., slender, naked, erect; sterile frond elliptical, 

 1 to 4 cm. long, 6 to 25 mm. broad, obtuse, coarsely and shallowiy crenate 

 except at the tapering base; fertile frond linear, 5 to 12 cm. long, 4 mm. 

 broad, with a lobe under each sorus, coriaceous, glabrous; midrib distinct, 

 veins immersed; sori about 20 in a row on each side of the costa, nearly 

 opposite, large, giving the fertile frond a knotted appearance. 



Mount Majayjay. on fallen timber, Steere. 



(34) P. Rudimentum Copeland. Rhizome wide-creeping, slender, cloth- 

 ed with linear-subulate scales; stipes 15 to 25 mm. high, filiform, straight 

 and erect, glabrous; frond orbicular-ovate, the fertile rather the narrower, 

 10 to 20 mm. long, rounded at both ends, entire or with fine incisions 

 marking the place of teeth, coriaceous, very glabrous; costa disappearing 

 below the apex, veins hidden, anastomosing irregularly or rarely free but 

 hamate; .sori few in a row on each side of the costa, nearer it than the 

 margin, round, somewhat immersed. 



Bagnio, on wet boulders, Elmer 0022. 



(35) P. stenophyllum Blume. Rhizome moderately thick, wide-creep- 

 ing, densely clothed with linear, pale brown scales; stipes 1 to 2 cm. high, 

 firm, erect; fronds 10 to 12 cm. high, 1 cm. broad, rounded above, attenuate 

 to the base, entire, coriaceous, glabrous; veins immersed, invisible, with 

 few veinlets; sori in single rows near the margin, roiuid, deeply inunersed, 

 and prominent from the upper side. 



Luzon, Ci()ni)ig 122. 

 Java to Ceh'bes. 



(36) P. longifolium Mett. Rhizome short-creeping, woody, its scales 

 linear, very dark; stipe about 2 cm. high, not distinct from frond; frond 

 30 to 40 cm. high, 10 to 20 mm. broad, subacute, entire and often revolute, 

 attenuate to the base, coriaceous, glabrous or nearly so; veins invisible, 

 areolae fine, with copious free veinlets; sori oblong, (piite imnierscd, placed 

 in a single row close and parallel to the margin, separated by more than 

 their own length. 



Mount Atoc, 1,500 m.. Lolirr ; Paragiia, Mrrrill 752. 

 Malaya. 



(37) P. tenuilore Kunze. Rhizome slender, scandent ; frond 20 to 50 

 cm. high, at most 12 mm. broad, acuminate, entire, attenuate to the sessile 

 or short-stipitate base, coriaceous, glabrous; main veins none, areobr fine, 



