34. DAVALLIA. § 2. COLPOSORIA. 225 



(24) O. dissecta, J. Sm. 



Rhizome scales ferrugineous, subulate, more or less ciliolate-denticulate, 

 recurved or crisped, narrowed more or less gradually from a roundish 

 or oblong, adpressed, peltate base ; soriferous lobules (teeth) rather suddenly 

 dilated from a narrow, often linear base into a clavate-cuneate apex; 

 indusium semicylindrical, relatively long and narrow, + twice as long as 

 broad when ripe but shorter when young, the apex truncate or truncate- 

 rotundate, at length reaching the margin of the lobule. 



Also in New Guinea. 



(24a) See No. 17. 



(246) D. ILoordersii, ». A «,. n., in Bull. Btz., 1911, I, 5. 



Rhizome wide-creeping, densely scaly, the scales long, Unear-subulate, 

 ciliolate, rounded and peltate at the base, ascending and pale-brown wlrgn 

 young, at length dark and more irregularly spreading. Stipes distant, 

 naked, 4; 10—20 cm. long. Fronds ovate-deltoid, finely dissected, 4 — 5- 

 pinnatifld in the lower part, + 15 — 30 cm. each way, acute or acuminate. 

 Pinnae more or less oblique, the lowest the largest, triangular, + 8—16 

 cm. long, + 5—10 cm. broad at the base, acuminate, the lowest posterior 

 pinnula the largest. Ultimate segments erecto-patent, small, the lowest 

 anterior the largest, to + 3 — 6 mm. long, ± 1 — 2 mm. broad, the 

 narrowest linear, bluntish or acute, entire or toothed at the apex with 

 2 — 3 teeth, the broadest oblong, cuneate at the base, with 4 — 8 bluntish 

 or acute teeth in the upper half. Texture thinly coriaceous; rachises and 

 surfaces naked; upper surface brown when dry; main rachis marginate 

 in the upper part, secondary rachises narrowly winged; veins 1 to each 

 tooth; no spurious veinlets. Sori on the dilated apices of the ultimate 

 segments, narrowly winged by the edge of the segments, with 1 or 

 mostly 2 sometimes very long teeth or horns beyond them; indusium 

 semicylindrical or urceolate, ± 2 — 3 X as long as broad, often narrowed 

 at or near the apex, the apex rather truncate, at some distance (',3 — V2 

 mm.) from the margin of the segment. — Near D. dissecta J. Sm. 



Java. 



(24c) See No. 15. 



(24(/) See No. 16. 

 Feens and Fern Allies. 15 



