22. DRYOPTEKIS. § 1. LASTREA. 155 



remote. Sori numerous, subcostular; indusium firm, brown, persistent, 

 white-setose. 

 Sumatra. 



(21c) O. siiperKciali!^, r. A. v. n., in Bull. Btz., 1915, XX, 12. 



Stipes more than 55 cm. long, like the rachis pale-fuscous and 

 probably very minutely puberulous when young. Fronds ovate-lanceolate, 

 ± 135 cm. long, acuminate, 2-pinnatifld. Pinnae numerous, remote, 

 linear-laneeolate, gradually long-acuminate; higher pinnae erecto-patent, 

 sessile or adnate; inframedial pinnae -largest, subsessile, horizontal or 

 spreading, ± 25 — 30 cm. long, + ^ cm. broad, deeply pinnatifid 

 narrowed at the base; lowest pinnae conspicuously petiolate, reduced 

 but not auricle-like. Lobes spreading, linear-oblong, subfalcate, ± 2 — 3 

 mm. broad, somewhat dilated at the- base, blunt, entire, when dry 

 revolute at the edge. Texture herbaceous, upper surface naked, lower 

 very minutely puberulous, giabrescent; veins + 20 — 25 on a side in the 

 longest lobes, simple, upcurved. Sori numerous, medial or inframedial, 

 superficial ; indusium rudimentary, hardly detectable even in the 

 youngest sori. 



Obi Island. 



(22) D. inimersa, o. stme. 



Stipes aggregate, stout, pale-brown, densely scaly towards the base, 

 sparingly so towards the frond, for the. rest densely, deciduously pilose 

 with whitish, acute hairs, as is the rachis, at length smooth or very 

 finely asperulous and provided with very minute, scattered warts 

 (persistent bases of fallen scales). Pinnae numerous, rather spreading, 

 close or approximate, linear, subulate-acuminate, deeply pinnatifid or 

 nearly pinnate, the lower narrowed towards the base. Segments very 

 numerous, sessile or subsessile, Unear or linear-oblong, . horizontal or 

 nearly so, obtuse or subacute, approximate, or somewhat remote with 

 the sinuses nearly as broad as the lobes, the edges parallel, entire or 

 sabrepando-crenulate, the lowest posterior lobes of the lower pinnae often 

 gradually much abbreviated, deflexed and appressed on the main rachis. 

 Texture thin; veins simple, straight or the lower arcuate, + 12 — 20 on each 

 side. Sori numerous, prominent above, supramedial on the veins, occupying 

 nearly all the veins except the highest,, the lower somewhat divaricating. 



Java. 



