AsriiMr.-i: i'dlvsikiii m. 17 



without .iwns, falcate, acutt-, auriclcd nn tlic iii>por side, subcoriaceous ; 

 sori niiinitt'. scattered, iiidusia almost Wiintiiig. 



Mount Mariveles, 1,400 ni., Lolur. 



India to Fornuisa (tlie type). 



(3) P. aculeatum (S\v.) Roth. Stipes tufted, 15 cm. and upward in 

 heipht. more or less clothed with ovate-lanceolate and fibrillose pale brown 

 .seniles; frond .30 to (iO cm. high, 20 cm. broad, bipinnate below or almost 

 throughout ; pinna; close, horizontal, lanceolate; pinnules ovatc-rhomboidal, 

 oblique, auricled on the acroscopic side at base, aristatc-serrate, sub- 

 coriaceous, almost glabrous; rachises fibrillose or scaly; sori principally 

 in rows, nearer the midrib than the margin. An exceedingly variable 

 species, or type of a large group of closely related species, of which our 

 material is not sufficient to determine which are distinct enough to be 

 profitably named. Beside fairly typical specimens the following varieties 

 are reported : 



Flastatum Ten., Davao, Warbury 141.50. 



.^uhamfrntim Christ. Davao, Warburf/ 14124, 141.30. 



lint janense Christ, which is almost triiiinnate, Benguet, Loher. 



Luzon, Steere; Davao, Warburg 14149, Copeland 10.31. 



Cosmopolitan. 



(4) P. obtusum (Mett.) Presl. Stipes tufted, 10 to 15 cm. high, densely 

 clothed with large, ovate-acuminate, bright brown scales; frond 30 cm. or 

 more high, 10 to 15 cm. broad, lanceolate; pinnte numerous, distant, linear- 

 lanceolate, the lower ones 6 to 10 cm. long; pinniiles distinct, oblong- 

 rhomboidal, the obscure teeth blunt or mucronatc, subcoriaceous, glabrous; 

 rachis densely fibrillose; sori in rows midway between the midrib and 

 margin. 



Luzon. Cinning 234. Lobb ; Mount Arayat, Loher; Bagnio, Topping 170. 

 Xot very distinct from P. aculeatum. 



(5) P. amabiie (Bl.) Presl. Rhizome creeping, scaly; stipes scattered, 

 about .30 cm. high, slender, stramineous, scaly toward the base; frond 30 

 cm. or more high, 20 to 25 cm. broad, with a lanceolate, acuminate, terminal 

 pinna, and 3 to (! similar lateral ones on eacli side; pinnules rhomboidal, 

 with at least half of the lower side cut away, 10 to 15 mm. long, over 

 half as broad, the upper side and outer half of the lower lobed and sharply 

 spinulose-serrate, subcoriaceous, glabrous; sori submarginal, small. 



Benguet, Loher; Davao, Copeland 1114. 

 India to Formosa and Java. 



(6) P. aristatum (Sw.) Presl. Rhizome creeping; stipes scattered, 30 

 to 50 cm. higli. clothed at least toward the base with linear or fibrillose 

 scales; frond 30 to 60 cm. high, 20 to 30 cm. broad, ovate-deltoid, tri- 

 or quadripinnatifid; lower pinna; largest, 15 to 25 cm. long, .subdeltoid; 

 lowest pinnules nnich largest, lanceolate-deltoid, 5 to 10 cm. long, with 

 subdeltoid lower segnnents; teeth copious, aristate; texture subcoriaceous; 

 glabrous, rachis nearly so; sori small, principally in rows near the 

 midrib; indusium sometimes reniform. 



2403*; 2 



