25. ASWDIUM. § 2. SAGENIA. 247 



* (27) A. decurrens, Pf., Christ, Pamkr. d. Erde, 229 ; A. pleropua, 

 Kze, Bedd., Ferns S.I., tab. LXXXII; Sagenia decurrens, lloulst. (not Moore) ^ 

 Rac, Flor. Btz., I, 196; Nephrodium decurrens. Bit., Hk. Bk., Syn. Fil., 299.' 

 Tectaria decurrens,' CopeL, Philipp. Journ., 11, 412, p. p.; — var. mamillosum; 

 A. mamillosum, C. Chr.,,Ani. Fil.; S. mamillosa, Moore, in Gard. Chron., 

 N. S., XXVI, 330. 



Rhizome creeping or erect, scaly. Stipes; 20—60 c.M. long, winged often 

 .nearly or quite to the base. Fronds 60—120 c.M. long, 30—60 c.M. broad, 

 cut down to a winged rachis into 3 — g pairs of entire, repand or sinuate 

 linear-oblong, acuminate laciniae IS — 30 c.M. long, 2—6 c.M. broad, terminal 

 segment similar, the lowest ones often bifurcate. Texture herbaceous or 

 subcoriaceous ; surfaces naked ; main veins distinct to the edge, connected by 

 copious areolae with free veinlets. Sori rather large, in 2 rows between the 

 main veins; indusium persistent. — Resembling A. vastum, Bl. 



\'ei.v. BBiaiiiilSosiasia: Sori deeply immersed so as to form promi- 

 nent papillae on the upper surface of the frond. 



Malaya; North. India, Soulh. China, Polynesia; — var. mamillosum .• Malaya. 



(28) A. paliuatuan, Mett., Ann. Mus. Bot. L. B., I, 238; Sagenia 

 palmata, Christ, Ann. Btz., XX, 108. 



Rhizome short, erect; the scales lanceolate, ciliate or dentate, ferrugineous, 

 nearly glossy. Stipes densely tufted, 30 — 40 c.M. long, glossy, purpureous. 

 Fronds 15 — 25 c.M. long, 20 — 25 c.M. broad, palmatipartite, cordate at the 

 base. Central segment ovate-oblong, acuminate, the lateral ones 2-fid with a 

 large, falcate, erecto-patent, anterior lobe and a smaller, spreading posterior 

 one. Texture .membranaceous or thinly chartaceous; surfaces naked; costae 

 and veins prominent; primary ai'eolae in 6 — 8 rows on each side, divided 

 into nearly regular smaller, ones. Sori in 2 regular rows between the main 

 veins; indusium rigid, roundish-reniform, subpeltate, with a short-toothed 

 margin. 



Sumatra, Borneo. 



(29) A. stenophylliiitB, niels, Engl. & Prantl., Nat. Pfl.Fam., l\ 

 185; A. ■ Hosei, C. Chr., Ind. Fil.; Nephrodium Hosei, Bk., Ann. of Bot., V, 

 330 ; N. slenophyllum, Bk., Journ. of Linn. Soc, Bot., XXII, 227, tab. XI. 



Stipes slender, tufted, naked, castaueous, 10—13 c.M. long. Fronds ter- 

 nate, 10 — 13 c.M. each way, the lateral segments nearly as long as the central 

 one, each made up of 3 linear, entire, acuminate free or joined, secondary 



