﻿25. ASPIDIUM. § 2. SAGENIA. 243 



distinct nearly to the edge, slightly upcurved; areolae distinct, fine, with 

 numerous free veinlets. Sori not copious, scattered irregularly, some of them 

 sometimes confluent; indusium fugacious. 

 Borneo (Teuscher). 



(16) A.. psIBopodum, C. Chr., Ind. Fil.; Nephrodium subdigitatum, 

 Bk., Journ. of Linn. Soc, Bot., XXIV, 259; Sagenia subdigilala, Christ., Ann. 

 Btz., XX, 100. 



Rhizome erect. Stipes densely tufted, 7 — 10 c.M. long, with a few, 

 spreading, black-brown scales near the base. Fronds small, deltoid, subdigi- 

 tate. Pinnae 5 — 7, lanceolate, acuminate, the edge entire or repand, the 

 lower ones usually forked at (he base, the terminal one the largest, distinctly 

 stalked, + 7 — 8 c.M. long, 1 — I'/j c.M. broad at the middle, distinctly re- 

 pand, narrowed gradually to both ends. Surfaces naked; no distinct main 

 veins; areolae copious. Sori not very small, irregularly scattered; indusium 

 firm, persistent. 



Borneo. -^ 



* (17) A. polyiiiorphuiii, Wall., Christ, Farnkr. d. Erde, 229; 

 Bedd., Ferns S.I., tab. CXVI; A. grandifolium, Med., Farng., IV, Phegop. Sc 

 Aspid., 124; A. angulatum, Christ (not J. Sm.), Bull. Herb. Boiss., T S^rie, VI, 

 1003; Nephrodium polymorphum, Bk., Hk. Bk., Syn. Fil., 297; Sagenia poly- 

 morpha, Christ, Ann. Btz., XX, 108; Tectaria polymorpha, Copel, Vhili^ip. iourn., 

 II, 413; — var. V^ightii : N. Wightii, Clarke, Trans. Linn. Soc, Bot., 2'^ Series, 

 I, 538, tab. LXXVI; — var. subvariegatum, Hort. Bog. 



Rhizome creeping. Stipes seriate, to 30 c.M. long or longer, brown, 

 naked or ± scaly. Fronds 30 — 120 c.M. long, 25 — 45 c.M. broad. Terminal 

 pinna lanceolate-oblong, 10 — 30 c.M. long, 2 — 8 c.M. broad, entire, acuminate, 

 ± rounded at the base ; below this 2 — 6 similar, lateral pinnae on each side, 

 the higher ones ± sessile or adnate to the rachis, mostly distinct, rarely 

 joined with the terminal one, the lower ones + stalked, often forked at the 

 base on the lower side. Texture papyraceous to coriaceous; rachis brownish, 

 naked or nearly so; surfaces naked; areolae fine, with copious free veinlets. 

 Fertile pinnae not contracted. Sori small, abundant, scattered, placed on the 

 connected vdns; indusium mostly present, reniform or peltato-cordate to orbi- 

 culai', the edge not rarely irregularly fimbriate. 



Tar. ^Wightii: Fertile pinnae contracted; sori in 2 rows between 

 the main veins. 



