166 22. DEYOPTEEIS. § 1. LASTBEA. 



lobes, sometimes uniting so as to form here or there a single costal or 

 costular areola; a siiiiple, forlied on pinnate vein often proceeds from the 

 costa or costula in the direction of the sinus between two segments. 

 Sori terminal on the veins, nearer the margin than de central ribs; 

 indusium reniform, naked. — Fertile portions of the fronds not rarely 

 more or less contracted. — Very variable; resembles Pleocnemia mem- 

 branifolia Bedd. in the smaller forms. 



Br. India across Malaya to Tropical Australia and Polynesia, 

 Madagascar. 



(42a) O. herbacea, ». A. ». «., in Bull. Btz., 1915, XX, 13. . 

 ■■ Rhizome erect, the extremity clothed with crowded, ovate-lanceolate, 

 acuminate, entire, pale-ochraceous-brown scales. Stipes fasciculate, + 

 30 cm. long, provided towards the base with linear-subulate, crisped scales. 

 Fronds ovate, + 45 cm. long, + 30 — 35 cm. broad, deeply 3-pinnatifld, 

 acuminate, the rachis somewhat flexuose, when j^oung probably provided 

 with fihform scales, at length naked. Largest pinnae sabhorizontal, 

 shortly petiolulate, lanceolate-triangular, + 8 — 9 cm. broad near the base, 

 the rachis sparingly flbrillose-squamulose, narrowly winged. Pinnulae- 

 somewhat remote, horizontal, the lower adnate with a much contracted 

 base, the higher broadly adnate, the lowest much reduced, the following 

 the largest, ovate-lanceolate, broadest aJsove the base, the central 

 triangular-lanceolate, broadest at the truncate base; largest pinnulae to 

 ;£■■ 4'/2 cm. long, to + 1% cm. broad deeply pinnatifid. Lobes oblong. 

 Close, nearly horizontal, the largest . + 7 ' ^ mm. long, + 3 '/2 mm. 

 broad, broadly rounded at the apex, obliquely bluntly crenate-denticulate ; 

 higher teeth subtriangular, lower broad, retuso-truncate. Texture thin ; 

 surfaces sparingly minutely flbrilloso-squamulose on the costae, costulae 

 and veins; veins forked, to 5 on a side. Sori small, medial; indusium 

 rudimentary or soon evanishing. 

 Java. 



(43a; See No. 56a. 



(45) D. Raciborskii, v. A. v. E. 



Omit this, it is a form of D. dissecta 0. Ktze. 



• - (46) D. rccetleiis, o. Htme. 



