﻿APPENDIX. 22. DRTOPTERIS. 821 



numerous, in 3 irregular rows; indusium black-brown, orbicular, persistent. 

 — Philippines. 



(99c) U. luzouica, Christ, Philipp. Journ., II, 196; — var. pube- 

 rula & polyolis, Christ, 1. c, 197. 



Like D. basilaris, C. Chr., but distinguished by the following characters: 

 Stipes slender, flavido-stramineous, naked, or minutely scaly at the base. Pin- 

 nae more distant, much elongated to an almost filiform apex, opposite, 

 horizontal, dilated (substipulate) at the base on both sides; 1 — 2 lowest pairs 

 of pinnae reduced to mere auricles. Lobes blunt, often truncate and den- 

 ticulate. Texture thin, diaphanous; colour pale-emerald-green; veins often 5 

 on each side. Indusium thin, caducous. 



War. puberiila: Rachis, costae and veins puberulous. 



Var. polyotiiS: Pinnae ± 16 m.M. broad at the base, short-acumi- 

 nate; lower pinnae reduced to mere auricles; auricles + 20 on each side, 

 reaching tq the base of the stipe. 



Luzon. 



^ (102) O.^ paraisitica, O. Mtme. — Insert as a variety: — var. 

 falcatula, Christ, Philipp. Journ., II, 197. 



Var. falcatula: Lower pinnae opposite, refracted, stipulate at the 

 base on the anterior side; lobes deeply incised, falcate. — Mindanao. 



(111«) W. today en isis, CUrist, Philipp. Journ., 11, 193. 



Rhizome suberect, black-brown, nearly naked. Stipes thick, firm, grey- 

 brown, + 40 c.M. long, naked or sparingly covered with lanceolate, brown 

 scales. Fronds 70 c.M. or more long, + 20 c.M. broad, oblong, acuminate, 

 the rachis grey-brown, puberulous. Pinnae numerous, 40 — 53 on each side, 

 close, ± 11 c.M. long, + 11 m.M. broad, the apex caudato-acuminate, the 

 base subcallous, cuneato-truncate, nearly unequal-sided, the margin cut lo 

 '/2-way down lo the costa, the lobes close, ± 45 on each side, lanceolate, 

 + 2 m.M. broad, acute, strongly falcate; lower pinnae rudimentary, sudden- 

 ly reduced into 8 — 10 short auricles. Texture herbaceous, flaccid; colour 

 black-green ; upper surface puberulous, lower clothed with adpressed hairs 

 on the costae and costulae; veins 7—8 on each side, the lowest anastomos- 

 ing, the next following terminating in the acute sinuses. Sori minute, me- 

 dial; indusium small, brown, puberulous, 



Mindanao, Negros, 



