﻿518 606. DICTYOPTERIS. § 1. ARCYPTERIS. 



Philipp., 3S; C. Chr., Ind. Pil., Tectaria irrigua, Copel., Philipp. Journ., II, 

 413, p. p. 



Rhizome ascending. Stipes + 10 — 25 c.M. long, erect, minutely fibril- 

 lose like the rachis, the base covered with some few small scales. Fronds 

 15 — 25 c.M. long, subdeltoid, commonly 3-foliate. Terminal pinna 10 — 15 

 c.M. long, simple and lanceolate or more commonly deltoid and deeply 5- 

 furcate, the central lobe 2 — 3 c.M. broad, narrowed gradually towards the 

 acute or acuminate apex, the edge entire or inconspicuously undulate, the lateral 

 lobes suberect, 6 — 10 c.M. long. Lateral pinnae erecto-patent, short-stalked, 

 6 — 10 c.M. long, forked at the base on the lower side, the terminal lobe ± 

 acuminate, the lateral one shorter, more or less bluntish. Texture herbaceous ; 

 surfaces naked; main veins hardly reaching the margin; areolae with free 

 veinlets. Sori numerous, scattered irregularly, roundish or oblong. 



Luzon. 



(13) D. Ha^ncockii, «. A. n. JS.,* Polypodium Hancockii, Bit., Ann. 

 of Bot., VIII, 127 (not Journ. of Bot., XXIII, 106); Aspidium sumafranum, C. 

 Chr., Ind. Fil. 



Stipes firm, slender, glossy, naked, brown. Fronds deltoid, ternate, ± 

 45 c.M. long. Terminal pinna cordate-ovate, 20 — 25 c.M. long, 15—20 c.M. 

 broad, pinnatifid Vo'"^^! down. Lateral pinnae petiolate, ovate, 12 — 15 c.M. 

 long, the lower side produced, distinctly auricled. Texture membranaceous; 

 surfaces naked; rachis naked, glossy, castaneous; main veins curved; areolae 

 hexagonal, copious, with numerous free veinlets Sori semiglobose, superficial. 



Sumatra. 



(14ffi) D. heterosora, Bedd., Handb. Ind. Ferns, 302; Polypo- 

 dium heterosorum, Bk., Hk. Bk., Syn. Fil., 506 ; Aspidium vastum, BL, var., 

 C. Chr., Ind. Fil. 



Stipes short, brown, with spreading, linear scales. Fronds oblong-spathu- 

 late, 60 — 90 c.M. long, deeply pinnatifid, the lowest foot only a narrow wing 

 to the costa; above this 3 — 4 pairs of distant, oblong-lanceolate, acuminate 

 lobes 4 — 5 c M. broad at the middle, confluent in a narrow wing, the lowest 

 simple or 2-partite. Texture thin but firm ; surfaces naked ; ribs naked, brown- 

 ish; main veins distinct to the edge, with distinct arches between them, and 

 copious small areolae with free, included veinlets. Sory very abundant, small, 

 irregular, often confluent. — ? An exindusiate form of Aspidium vastum, BL 



Malacca. 



