ASPIDIEJE POLYSTICHUM. 17 



without awns, falcate, acute, auricled on the upper side, subcoriaceous ; 

 sori minute, scattered, indusia almost wanting. 



Mount Mariveles, 1,400 m., Loher. 



India to Formosa ( the type ) . 



(3) P. acuieatum (Sw.) Roth. Stipes tufted, 15 cm. and upward in 

 height, more or less clothed with ovate-lanceolate and fibrillose pale brown 

 scales; frond 30 to 60 cm. high, 20 cm. broad, bipinnate below or almost 

 throughout; pinnae close, horizontal, lanceolate; pinnules ovate-rhomboidal, 

 oblique, auricled on the acroscopic side at base, aristate-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: 



Hastatum Ten., Davao, Warburg 14150. 

 Subamoenum Christ, Davao, Warburg 14124, 14136. 

 Batjanense Christ, which is almost tripinnate, Benguet, Loher. 

 Luzon, Steere; Davao, Warburg 14149, Copeland 1031. 

 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; pinna? numerous, distant, linear- 

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

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

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

 margin. 



Luzon, Cuming 234, Lobb; Mount Arayat, Loher; Baguio, Topping 179. 

 Not very distinct from P. acuieatum. 



(5) P. amabile (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 6 similar lateral ones on each 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. high, 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 pinnae largest, 15 to 25 cm. long, subdeltoid; 

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

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

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

 midrib; indusium sometimes reniform. 



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