.156 22. DRYOPTEBIS. § 1. LASTBEA. 



(22a) D. bipinnata. Copeh, in Philipp. Journ., IX'^, 2. 



Stipes 30 cm. long, slender but firm, brown, black at the base, the 

 upper part very minutely pubescent, as is the rachis. Fronds + 30 cm, 

 long, + 17 cm. broad, abruptly long-acuminate, 2-pinnatifld, sub-2-pinnate 

 • at the base. Pinnae horizontal, straight or subfalcate, sessile, the lower 

 short-stalked, not reduced, the rachis minutely pale-setulose. Segments 

 ' numerous, + 20 — 30 on a side, oblique, acute, crenulate at the apex, 

 + 7 mm. long by 2 mm. broad, the lower free, short, shortly petiolulate. 

 Texture papyraceous; veins to 10 on a side, simple, sparingly setose 

 beneath. Sori numerous, subimmersed, submarginal; indusium densely 

 short-hairy, persistent. 



New Guinea. 



(24rt*) O. HeliiiUzei, Bram., in Lautb., Beitr. Flor. Pap., I, 19. 



Fronds lanceolate, to 85 cm. long and 35 cm. broad, acuminate, 

 hardly narrowed at the base. Pinnae sessile, to 20 on each side below 

 the pinnatifid apex, ascending, lanceolate, to 25 cm. long and 4 ' 4 cm. 

 broad, deeply pinnatifid, the apex repand, caudate-acuminate; higher 

 pinnae approximate, lower remote, a little abbreviated. Lobes subspreading, 

 linear, to 2';',, em. long and 3'/, mm. broad, approximate, separated by 

 rounded sinuses, subobtuse, entire or crenulate. Texture membranaceous ; 

 surfaces naked; rachises, costae and costulae hairy; veins simple, to 17 

 on a side. Sori numerous, to 16 on a side, marginal; indusium nearly 

 round, rather large, hairy, fugacious. 



New Guinea. 



(25«i D. besukiensis. ». A. v, «., in Bull. Btz., 1911, I, 7. 



Stipes + 30 — 35 cm. long, pale-brown, glabrous at least in the fully 

 deve'oped fronds, the base clothed with moderately long, brown, subulate, 

 entire scales. Fronds ovate-lanceolate, to 40 cm. or more long, + 25 — 30 

 cm. broad, 2-pinnatifld. Pinnae spreading or horizontal, linear-lanceolate, 

 + l'/-i— l\i cm. broad, sessile, cut down nearly to the costa into 

 numerous spreading or subhorizontal lobes, the apex acuminate; central 

 pinnae largest, truncate at the base ; lower pinnae somewhat deflexed, 

 slightly abbreviated, narrowed towards the base. Lobes entire, oblong 

 or linear-oblong, blunt, the edges parallel, slightly recurved, finely ciliated. 

 Texture herbaceous or submembranaceous ; rachis naked at least in the 

 fully developed fronds; upper surface hairy on the costae and veins but 



