418 ^74. DErOSTACHYTJM. 



above, subterete and glabrescent beneath; costulae and main veins 

 conspicuous, prominent, clotlied beneatli witli linear, fimbriate, brown, 

 pale-margined scales. Sori large, round or oval, immersed, not confluent. 

 New Guinea. 



Like Dryostachyum but the sori rather small, occupying the veins only. 

 Borneo to the Philippines. 



* Sori in 1 roio on each side of the costa.- (1) A. Meyeniana. 



** Sori in 2 or more rows on each side of the costa. (2) A. Brooksii. 



(1) A. lleyemiaBia, Schott., Ban. & Hk., G-en. Fil., tab. XCI; 

 Kze, Farnkr., I, tab. LXXXI; Poly Imodium Meyenianum, Hk. (not. Schott.), 

 Hk. Bk., Syn. Fil., 366; Diels, in Engl. & Prantl., Nat. Pfl.fam., I*, fig. 

 166 A—G; C. Chr., Ind. Fil. 



Rhizome very stout, the scales dense, linear, crisped, bright-ferrugineous, 

 1 — I'/j cm. long. Fronds 60—100 cm. long, the basal part barren, ± 15 

 cm. long, shallowly lobed, the central part 20 — 30 cm. broad, sterile, cut 

 down nearly to the costa into erecto-patent, linear-oblong, blunt, entire 

 lobes 7 — 15 cm. long, I — 3 cm. broad, the upper part fertile, pinnate, the 

 pinnae 10 — 20 cm. long, narrowly linear, with the lamina cut away 

 between the sori, i. e. consisting only of a firm midrib with a row of 

 smal, nearly semiorbicular lobes on each side, each with a single sorus. 

 Testure coriaceous; surfaces naked; main veins reaching the margin; 

 areolae copious, with free veinlets. 



Philippines. 



(2) A. Brooksii, Copeh, in Philipp. Journ., VF, 141, tab. XXV; 

 Polypodium Brooksii, G. Ghr., Ind. Fil., Suppl. 



Near A. Meyeniana Schott but the fronds somewhat longer, with the 

 basal part broader and more deeply lobed, the fertile pinnae broader, the 

 lamina not cut away between the sori, and the sori placed in 2 rows 



Bg».«-««.,«..««^.«..^«,..^»,,,»»»«„« 



