﻿188 22. DRYOPTERIS. § 1. LASTRAEA. 



Var. Hallieri : Fronds smaller ; pinnae narrower, the lower ones 

 narrowed towards the base ; rachis di^ciduously scaly like the stipe ; pinnae 

 pubescent on the costa and slightly so at the margin; sori superficial, the 

 lower ones divaricating. (Hallier No. 248, determined by Burck as Aspidium 

 immersum., BL). 



Borneo. , 



* (22) ©. iiiiiiieriia, O. Ktxe, C. Chr , Ind. Fil. ; Aspidium immer- 

 sum, BL, Rac, Flor. Btz., I, 169; Laslraea immersa, Moore, Bedd., Handb. Ind. 

 Ferns, 234; Nephrodium immersnm, Hk., Hk. Bk., Syn. Fil., 265. 



Rhizome short-creeping. Stipes approximate, 70—120 c.M. long, glossy, 

 slightly scaly at the base. Fronds 80—200 c.M. long, 30—70 c.M. broad, 

 ovate-oblong. Pinnae sessile, 2 — 4 c.M broad, almost hoiizontal, acuminate or 

 nearly caudate, cut down nearly to the costa into ± close, spreading or nearly 

 spreading, straight or subfalcate, subacute, linear lobes 2 — 5 m.M. broad. 

 Texture herbaceous; upper surface naked or provided with distant, inconspi- 

 cuous hairs; under surface and rachis provided with minute, yellow, glandular 

 dots or stiff, white hairs. Sori near the ' margin, 1 to each vein, much 

 immersed as to project on the upper surface; indusium persistent, reniform, 

 the basal lobes overlapping. 



Malaya. 



* (23) O. Peekeli, ». a. ». n. 



Stipes ± 10 c.M. long, naked or slightly glanduloso-pilose. Fronds lan- 

 ceolate or obovate, ± 30—40 c.M. long, 15—20 c.M. broad. Pinnae 18— 22 

 on each side below the deeply pinnatidd apex, linear-lanceolate, the central 

 ones the largest, rather spreading, acuminate, 1—1 '4 c.M. broad, sessile or short- 

 stalked, cut down nearly to the costa into linear-oblong, erecto-patent or sub- 

 spreading, entire, bluntish segments 1 ^2 — 2 m.M. broad, the lowest lobes not 

 or hardly shorter. Lowest pinnae shorter, deflexed, with the lowest segments 

 free and only those on the upper base broader and deeply toothed or pinnatifid. 

 Texture thin; rachis and surfaces finely short-hairy ; veins 8 — 10-jugale, simple. 

 Sori submarginal, solitary at the base of the lobes or numerous along the 

 edges; indusium villose. 



New Guinea (Peekel, No. 44). 



(24o) D. Dayi, C. Chr., Ind. Fil.; Aspidium Dayi, Bedd., Journ. of 

 Bot., XXVI, 4; Lastraea Dayi, Bedd., Handb. Ind. Ferns, Suppl., 54; Nephro- 

 dum Dayi, Bedd., Journ. of Bot., XXV, 323. 



