﻿APPENDIX. 22. DRTOPTERIS. 817 



lowest part, lobed towai'ds the apex, the lobes decurrent, oblong, subacute, 

 ± 8 ra.M. broad, with the sinuses acute, toothed, the teeth decumbent. 

 Texture coriaceous; colour yellowish-green, rather glossy; veins pinnate and 

 2 — 5-furcate in the lobes. Sori numerous, minute, medial or submarginal ; 

 indusium black, carnoso-coriaceous, soon convolute, persistent. 

 Balabac, Palawan, Sihuyan. 



(58a) D. dubia, C&pel., Leafl., I, 255. 



Rhizome ascending, clothed with lanceolate, castaneous scales. Stipes 

 approximate, 10 — 20 c.M. long, red-castaneous, clothed towards the frond 

 (like the rachis) with minute hairs and small, distant scales. Fronds lan- 

 ceolate-deltoid, to 50 c.M. long, to 20 c.M. broad, acuminate, 4-pinaatifid. 

 Pinnae opposite or the higher ones alternate, the lower deltoid, to 12 c.M. 

 long, to 10 c.M. broad. Ultimate divisions lanceolate, cut down nearly to 

 the costa into obtuse, broadly oblanceolate segments. Texture membrana- 

 ceous; surfaces nearly naked; veins simple. Sori terminal; indusium athy- 

 rioid, sometimes nephrodioid with a broad or nearly closed sinus, rarely as- 

 plenioid. — Judging by the sori this fern would be an Athyrium, but the 

 frond's form and the colour and texture of the indusium mark it as a rela- 

 tive of Dryopteris rhodolepis, C. Chr. (Copel). 

 , Luzon. 



* (59) I>. isetigera, O. Stxe. — Insert as synonyms: Laslraea flac- 

 dda, Bedd., Perns S.I., tab. IC; Cheilanthes setigera, BL, (oldest name). — 

 My var. pallida seems to be the common form or even the type itself. Omit 

 its synonyms, which are synonyms of Phegopteris ornata, Fee. 



* (61a) O. Backer!, ». a. ». R., Bull. D6p. Agr. I. N., i908, 

 XVIII, 8; — var. aspera, v. A. v. R., 1. c, XXI, 3; Poly podium asperum, 

 Zipp., MS. in Herb. Bog. 



Stipes and rachises pale-brown, the upper side pubescent with a line of 

 fine, not very short, pale-coloured hairs, the rest provided throughout with 

 numerous squarrose, deciduous, narrow, linear-subulate, pale-brown, finely and 

 deciduously ciliate scales leaving the stipes and rachises rough by their per- 

 sistent bases. Fronds like those of D. setigera, 0. Ktze, but the primary and 

 secondary segments looser. Texture firm-herbaceous when dry ; tertiary rachises 

 narrowly winged, pubescent above and scaly beneath, as are the costae ; upper 

 surface nearly naked, lower hairy on the costulae and veins with whitish 



FiLicES. 52 



