94 POLYPODIACE.E OF THE PHILIPPINE ISLANDS. 



with simi^ly pinnate fronds hardly 3 cm. high, on filiform stipes, are some- 

 times copiously fertile. 



Benguet, Loher, Topping 22.5, 280; Lamao Forest Reserve, Whitford 266, 

 Copeland 1400; Davao, Copeland 969, 1113. 



China to New Zealand. 



(6) A. hispidulum Sw. Stipe (in Philippine plants) 3 to 15 cm. high, 

 deciduously squamiilous, then scabrous; frond pseudo-pedate. really tripin- 

 nate at base, the longer pinnae ascending together or somewhat divaricate; 

 segments about 1 cm. long, over half as deep, lower ones stalked, lower side 

 entire and straight or curved upward, upper and outer sides sharply toothed, 

 subcoriaceous, not quite glabrous; rachises decidedly hairy; sori round, 

 contiguous around the upper and outer margin; indusium hairy, con- 

 spicuously veined. Our plant is not the. typical A. hispidulum, but does not 

 seem to me reasonably separable from it. 



Mount Mariveles, 1,200 m., Merrill 3250, Copeland 1390. 



Paleotropic. 



(36) DORYOPTERIS .J. Smith. 



Rhizome short, its palese costate; stipe black and shining; frond more 

 or less deltoid, simple or pinnate with the pinnae not articulate to the 

 rachis. opaqiie; sori terminal, submarginal, in our species fusing laterally 

 and forming a continuous marginal line, protected by the narrow indusium 

 formed by the inflexed margin. A chiefly American genus, represented here 

 by two terrestrial species, readily distinguishable from Pteris by the black 

 stipes. 



(1) D. concolor (Langsd. & Fisher) Kuhn. Stipe 10 to 15 cm. high, 

 erect, wiry, with a few scales near the base like those on the rhizome; 

 frond triangular, 5 to 10 cm. each way, cut down nearly to the rachis into 

 3 to 5 pairs of segments, of which the lowest, sometimes distinct pinnae, are 

 much the largest, and especially deeply cut on the lower side into oblong 

 segments, which in turn are deeply lobed, with margin entire in detail, 

 subcoriaceous, opaque, glabrous or glaucous beneath, greenish above, brown 

 beneath ; veins free, invisible, midribs conspicuous, black. 



Luzon, Cuming (260 ?) ; Benguet, Elmer 6481; Manila, Loher. 

 Pantropic. 



(2) D. ludens (Wall.) .J. Sm. Rhizome slender, creeping; stipe about 

 10 cm. high, that of fertile frond higher, naked unless at the base; sterile 

 frond variable in shape, ovate-lanceolate or triangular, hastate, deeply 

 cordate or auriculate, sometimes with two or three pairs of lobes, acuminate, 

 with entire or crisped margin, subcoriaceous, glabrous, pale green beneath, 

 dark above; fertile frond deltoid, 15 to 20 cm. high, cut down to a central 

 part 10 to 15 cm. broad into terminal segment and 1 to 3 pairs of lateral 

 ones, of which the lowest are deeply forked, all aciuninate, ascending, entire; 

 veins hidden, anastomosing everywhere; fruiting line continuous except at 

 the tips of the segments, narrow. 



Luzon, Cuming 238; Benguet, Elmer 6349; Rizal, Loher. 

 India and ^lalava. 



