606. DICTYOPTERIS. § 1. ARCYPTEniS. 817 



i C.M. long, slender, flexuose, canaliculate, dark-brown or blackish, hairy or 

 ked, but clothed towards the base with linear, dark-purple scales, which make 

 B stipes rough when they fall. Fronds ± 5 — 10 c.M. long, ± 3—9 c.M. 

 oad, simple, broadly cordate with a deep sinus, the margin entire or un- 

 late, the basal lobes sometimes meeting or overlapping. Texture subcoria- 

 ous, fragile; upper surface naked or hairy, lower densely clothed with 

 reading, reddish hairs; main veins 10—12 on each side, conspicuous and 

 ominent like the costa, straight, reaching the margin; veins hidden, form- 

 j moderately regular, tetra- or pentagonal areolae with free veinlets. Sori 

 nctiform, "scattered irregularly. 

 Borneo. 



• (11) D. labrnsca, ». A. v. n.. Bull. D6p. Agr. I. N., 4908, XVIII, 

 ; Pelypodium Lahrusca, Hk., Rao.i — Flor . BtB i | I; lOOj Hk i; Spec. Pil., V, 

 , tab. CCLXXXV, B; Nephrodium Lahrusca, Rac., Bull. Ac. Crac, i902, 61; 

 genia Lahrusca, Christ, Ann. Btz., XX, 108; Aspidium lahrusca, Christ, Ann. 

 i., XV, 137; C. Chr., Ind. Pil.; Tectaria Lahrusca, Copel., Philipp. Journ., 

 410; — var. Boschae, Rac, 1. c , 61; var. tornata, Vi A. Vi R i ; L Oijtab i 



Rhizome woody, erect, the scales linear- or lanceolate-subulate. Stipes 

 )wded 10 — 25 c.M. long, firm, naked, erect, glossy, the base dark-coloured 

 i slightly scaly. Fronds 7 — 18 c.M. long, 6 — 15 c.M. broad. Texture sub- 

 "iaceous ; surfaces naked ; costae and main veins distinct ; areolae fine, visible, 

 jious, with free veinlets. Sori minute, scattered irregularly. — 



Forma typica : Fronds simple, cordate with a deep sinus, the edge ontii'o 

 sinuate, the point acute. 



Var. Boschae: Stipes 20—40 c.M. long. Fronds 5-lobed, 10—35 

 1. each way, the base slightly cordate. 



— WaPi topnata i Fpondo 5 foliate. Terminal segment haatato 5 Qivjiik 

 broad, sinuate central lobe and 2 narrow, ± entire latergL-oiieS^ Lateral 

 ments free or connected with the terminal onejjipeOfved, unequal-sided, acu- 

 Qate, the upper base cuneate, sligJilly-rSunded, the lower cordate and broadly 

 inded, the edges i^grttH-cr""'^ 



I thmJiJftetCtBorski's Nusa-Kembangan plant would better be treated as a 

 tlnct epoci e s . — 



Borneo, Celebes; — var. Boschae: Borneo; vav.. tovnatui Nuea«Kemhanga» 



* (12) D. lampeniSiiS, v. A. v. JR.; Aspidium lamoense, Copel., Polypod. 



