﻿816 APPENDIX. 22. DRYOPTERIS. 



rigid, clothed with short, grey puhescence and long, black hairs. Fronds elon- 

 gate-deltoid, ± 30 c.M. long, + 20 c.M. broad at the base, 2-pinnatifid. Ter- 

 minal pinna incised, the lobes obtuse, subentire. Lateral pinnae + 7 — 8 

 on each side, oblong, blantish, lobed nearly to the costa at the base, the 

 lowest ones elongate-deltoid, with the lowest lobes on the lower side produced 

 and deeply lobed. Texture herbaceous, flaccid; under surface paler than the 

 upper; costae and costulae distinct, black, the latter pinnate and forked in 

 the lobes, flexuose. Sori several on each lobe, terminal on the veins; indu- 

 sium grey, flaccid, fugacious. — Near D. spai'sa, 0. Ktze. 

 Luzon, Mindanao. 



* (45) 1>. Raeiboriskii, ». JL. «. R. — This species has a dis- 

 tinct sagenioid habit, with the veins sometimes pleocnemioid, forming here 

 and there a single costal or costular areola. 



* (46) 41. recedeiis, O. Ktze. — Insert as a synonym: Polypodium 

 recedens, J. Sm., (oldest name). 



* (51) O. intermedia, o. suxe. — Insert as varieties: — var. 

 Mannii, Christ, Philipp. Journ., II, 215 ; Nephrodium Mannii, Hope, Journ. of 

 Bot., XXVIII, 146; — var. microloba, Christ, 1. c. 



Var. Slannii: Fronds resembling D. filix mas, Scholl, much elongat- 

 ed, oblong, 2-pinnatirid; pinnae regularly lobed, lobes simple, only the lowest 

 pinnae 2-pinnalifid, produced on the posterior side. 



War. iiiierolol»a : Stipe and rachis purpureous, densely clothed with 

 red-black, spreading Iiairs; lower pinnae 172 — 2 c.M. long, 72 c.M. broad; 

 lobes close, + 6 on each side, 2 — 4 m.M. broad. 



Mindanao. 



(56a) O. I»alaliaceni»is, Christ, Philipp. Journ., II, 215. 



Stipes ± 55 c.M. long, angular, naked like the whole plant, rufo-strami- 

 neous or castaneous, as are rachises. Fronds 5-pinnate, deltoid, + 50 c.M. 

 long, as broad or broader, 3-partite at the base. Pinnae + 8 — 10 below 

 the pinnatifid apex, distant, the lowest + 14 c.M. apart, + 30 c.M. or more 

 long, + 25 c.M. broad at the base, deltoid, on stalks + 5 c.M. long, the 

 lowest posterior pinnulae + 13 72 c.M. long, + 7 c.M. broad, the tertiary 

 segments ovate-oblong, 4 — 5 c.M. long, + 2 c.M. broad, obtusely inciso-lo- 

 bate; higher pinnae sessile, oblong, acuminate, cut down to the costa in the 



