APPENDIX. 22. DRYOPTERIS. 821 



numerous, in 5 irregular rows; indusium black -brown, orbicular, persistent. 

 — Philippines. 



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

 rula & polyotis, Christ, I. 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 furiclf;;. Lobes blunt, often truncate and den- 

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

 on each side. Indusium thin, « aducous. 



War. puberula: Rachis, costae and veins puherulous. 



Var. polyotis: Pinnae + 16 m.M. broad at the base, short-acumi- 

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

 reaching to the base of the stipe. 



Luzon. 



* (102) O. parasitica, O. Ktise. — Insert as a variety: — var. 

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



^ar. falcatula: Lower pinnae opposite, refracted, stipulate at the 

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



(Ilia) D. todayensis, Christ, Philipp. Journ., II, 195. 



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

 brown, jto 100 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, puherulous. Pinnae numerous, 40—53 on each side, 

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

 base subcallous, cuneato-truucate, nearly unequal-sided, the margin cut to 

 Vj-way down to 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 puherulous, 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, puherulous, 



Mindanao, Negros, 



