﻿ii. DRYOPTERIS. § 1. LASTRAfiA. 169 



Stipes 30 — 60 c.M. long, stramineous, naked, or with a few hair-like 

 scales towards the base. Fronds 45 — 60 c.M. long. Pinnae 12 — 15 c.M. long, 

 2 — 2^2 c.M. broad, the lower ones scarcely shorter, cut down nearly to the 

 costa into linear-oblong lobes o^j^ — 4 m.M. broad. Texture papyraceo-herba- 

 ceous, surfaces naked exept the costa, which is finely puberulous above ; veins 

 6 — 8 on each side, simple, not reaching the margin. Sori terminal on the 

 veins; indusium persistent. 



Malacca. 



* (246) ». diverisifolia, ». A. v. n. 



Rhizome erect or ascending. Stipes tufted or approximate, 3 — ^6 c.M. long, 

 pale-brown, copiously pubescent with more or less, short, whitish, spreading 

 hairs, scaly at the base, the scales brown, subulate, ciliale. Fronds acumi- 

 nate, + 6 — 12 c.M. long, ± 4 — 9 c.M. broad, triangular with the lowest pinnae 

 longest or obovate-lanceoate with the central pinnae longest and then the lower 

 pinnae deflexed and gradually growing shorter (dwarfed but not reduced into mere 

 auricles). Pinnae in + 6 — 10 pairs below the pinnatifid apex, close or imbricating, 

 the longest spreading, linear-oblong, 7 — 12 m.M. broad, the apex entire, blunt, 

 the edge pinnatifid + ^/4-way down or more, or even pinnate at the very base. 

 Secondary segments oblong, close or slightly imbricating, blunt, entire, the 

 lowest ones not rarely free and subdistaat. Texture herbaceous ; rachis pubes- 

 cent like the stipe; surfaces hairy on the veins and costae and minutely 

 so between the veins beneath; costulae pinnate in the lobes; veins simple. 

 Sori small, confined to the lobes, in 1 row on each side nearer the margin than 

 the costulae; indusium minutely pubescent, the margin beset with globose, 

 yellow glands, or the surface and the margin covered with yellow glands and 

 powder. 



Batu Islands (Raap, No 27). 



(25) D. patens, O. Ktxe, C. Chr., Ind. Fil. ; Aspidmm palens, Sw., 

 Christ, Farnkr. d. Erde, 251 ; A. deversum, Kze, Mett., Farng., IV, Phegop. k 

 Aspid., No. 209 ; Nephrodium polylrichum, Schrad., Gott. Anz., 869 ; N. patens, 

 Desv., Hk. Bk., Syn. Fil., 262. 



Rhizome oblique, slightly creeping. Stipes 30 c.M. or more long, naked 

 or slightly hairy, pale-coloured. Fronds 60—100 c.M. long, 20— 50 c.M. broad, 

 linear-oblong. Pinnae close, spreading, sessile with a broad base, 1 — 2 c.M. broad, 

 finely acuminate, cut down ± ^^ of the space to the costa. Lobes linear- 

 oblong, subfalcate, bluntish, entire or slightly crenate. Lowest pinnae not 



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